diff --git a/poetry.lock b/poetry.lock
index ad8a445..1a5f8c3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,38 +1,37 @@
 [[package]]
-category = "dev"
-description = "A configurable sidebar-enabled Sphinx theme"
 name = "alabaster"
+version = "0.7.12"
+description = "A configurable sidebar-enabled Sphinx theme"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "0.7.12"
 
 [[package]]
-category = "main"
-description = "Better dates & times for Python"
 name = "arrow"
+version = "0.16.0"
+description = "Better dates & times for Python"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.16.0"
 
 [package.dependencies]
 python-dateutil = ">=2.7.0"
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.2.1"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.2.1"
 
 [[package]]
-category = "dev"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "18.2.0"
+description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "18.2.0"
 
 [package.extras]
 dev = ["coverage", "hypothesis", "pympler", "pytest", "six", "zope.interface", "sphinx", "zope.interface", "pre-commit"]
@@ -40,183 +39,180 @@ docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest", "six", "zope.interface"]
 
 [[package]]
-category = "dev"
-description = "Internationalization utilities"
 name = "babel"
+version = "2.6.0"
+description = "Internationalization utilities"
+category = "dev"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.6.0"
 
 [package.dependencies]
 pytz = ">=0a"
 
 [[package]]
-category = "main"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2018.11.29"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2018.11.29"
 
 [[package]]
-category = "dev"
-description = "Validate configuration and produce human readable error messages."
 name = "cfgv"
+version = "2.0.0"
+description = "Validate configuration and produce human readable error messages."
+category = "dev"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.0.0"
 
 [package.dependencies]
 six = "*"
 
 [[package]]
-category = "main"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "dev"
-description = "Composable command line interface toolkit"
 name = "click"
+version = "7.0"
+description = "Composable command line interface toolkit"
+category = "dev"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "7.0"
 
 [[package]]
-category = "dev"
-description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\" or platform_system == \"Windows\""
 name = "colorama"
+version = "0.4.1"
+description = "Cross-platform colored terminal text."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.4.1"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "4.5.2"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, <4"
-version = "4.5.2"
 
 [[package]]
-category = "dev"
-description = "Docutils -- Python Documentation Utilities"
 name = "docutils"
+version = "0.14"
+description = "Docutils -- Python Documentation Utilities"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "0.14"
 
 [[package]]
-category = "dev"
-description = "A platform independent file lock."
 name = "filelock"
+version = "3.0.10"
+description = "A platform independent file lock."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "3.0.10"
 
 [[package]]
-category = "dev"
-description = "the modular source code checker: pep8, pyflakes and co"
 name = "flake8"
+version = "3.6.0"
+description = "the modular source code checker: pep8, pyflakes and co"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.6.0"
 
 [package.dependencies]
 mccabe = ">=0.6.0,<0.7.0"
 pycodestyle = ">=2.4.0,<2.5.0"
 pyflakes = ">=2.0.0,<2.1.0"
-setuptools = ">=30"
 
 [[package]]
-category = "main"
-description = "URL manipulation made simple."
 name = "furl"
+version = "2.1.0"
+description = "URL manipulation made simple."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2.1.0"
 
 [package.dependencies]
 orderedmultidict = ">=1.0.1"
 six = ">=1.8.0"
 
 [[package]]
-category = "dev"
-description = "File identification library for Python"
 name = "identify"
+version = "1.2.1"
+description = "File identification library for Python"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.2.1"
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.8"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8"
 
 [[package]]
-category = "dev"
-description = "Getting image size from png/jpeg/jpeg2000/gif file"
 name = "imagesize"
+version = "1.1.0"
+description = "Getting image size from png/jpeg/jpeg2000/gif file"
+category = "dev"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.1.0"
 
 [[package]]
-category = "dev"
-description = "Read metadata from Python packages"
 name = "importlib-metadata"
+version = "0.18"
+description = "Read metadata from Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0,!=3.1,!=3.2,!=3.3"
-version = "0.18"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "docutils (0.12)", "rst.linker"]
+docs = ["sphinx", "docutils (==0.12)", "rst.linker"]
 
 [[package]]
-category = "dev"
-description = "Read resources from Python packages"
-marker = "python_version < \"3.7\""
 name = "importlib-resources"
+version = "1.0.2"
+description = "Read resources from Python packages"
+category = "dev"
 optional = true
 python-versions = ">=2.7,!=3.0,!=3.1,!=3.2,!=3.3"
-version = "1.0.2"
 
 [[package]]
-category = "dev"
-description = ""
 name = "incremental"
+version = "17.5.0"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "17.5.0"
 
 [package.extras]
 scripts = ["click (>=6.0)", "twisted (>=16.4.0)"]
 
 [[package]]
-category = "dev"
-description = "iniconfig: brain-dead simple config-ini parsing"
 name = "iniconfig"
+version = "1.0.0"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.0"
 
 [[package]]
-category = "dev"
-description = "A small but fast and easy to use stand-alone template engine written in pure python."
 name = "jinja2"
+version = "2.10.1"
+description = "A small but fast and easy to use stand-alone template engine written in pure python."
+category = "dev"
 optional = true
 python-versions = "*"
-version = "2.10.1"
 
 [package.dependencies]
 MarkupSafe = ">=0.23"
@@ -225,70 +221,70 @@ MarkupSafe = ">=0.23"
 i18n = ["Babel (>=0.8)"]
 
 [[package]]
-category = "dev"
-description = "Safely add untrusted strings to HTML/XML markup."
 name = "markupsafe"
+version = "1.1.0"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "dev"
 optional = true
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "1.1.0"
 
 [[package]]
-category = "dev"
-description = "McCabe checker, plugin for flake8"
 name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.6.1"
 
 [[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "5.0.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "5.0.0"
 
 [package.dependencies]
 six = ">=1.0.0,<2.0.0"
 
 [[package]]
-category = "dev"
-description = "Node.js virtual environment builder"
 name = "nodeenv"
+version = "1.3.3"
+description = "Node.js virtual environment builder"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.3.3"
 
 [[package]]
-category = "main"
-description = "Ordered Multivalue Dictionary"
 name = "orderedmultidict"
+version = "1.0.1"
+description = "Ordered Multivalue Dictionary"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [package.dependencies]
 six = ">=1.8.0"
 
 [[package]]
-category = "dev"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "18.0"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "18.0"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.12.0"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.12.0"
 
 [package.dependencies]
 importlib-metadata = ">=0.12"
@@ -297,81 +293,76 @@ importlib-metadata = ">=0.12"
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "A framework for managing and maintaining multi-language pre-commit hooks."
 name = "pre-commit"
+version = "2.1.1"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+category = "dev"
 optional = true
 python-versions = ">=3.6"
-version = "2.1.1"
 
 [package.dependencies]
 cfgv = ">=2.0.0"
 identify = ">=1.0.0"
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+importlib-resources = {version = "*", markers = "python_version < \"3.7\""}
 nodeenv = ">=0.11.1"
 pyyaml = ">=5.1"
 toml = "*"
 virtualenv = ">=15.2"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = "*"
-
-[package.dependencies.importlib-resources]
-python = "<3.7"
-version = "*"
-
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.9.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.9.0"
 
 [[package]]
-category = "dev"
-description = "Python style guide checker"
 name = "pycodestyle"
+version = "2.4.0"
+description = "Python style guide checker"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.4.0"
 
 [[package]]
-category = "dev"
-description = "passive checker of Python programs"
 name = "pyflakes"
+version = "2.0.0"
+description = "passive checker of Python programs"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.0.0"
 
 [[package]]
-category = "dev"
-description = "Pygments is a syntax highlighting package written in Python."
 name = "pygments"
+version = "2.3.1"
+description = "Pygments is a syntax highlighting package written in Python."
+category = "dev"
 optional = true
 python-versions = "*"
-version = "2.3.1"
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.3.1"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.3.1"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "6.0.1"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "6.0.1"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 more-itertools = ">=4.0.0"
 packaging = "*"
@@ -379,98 +370,94 @@ pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa_mypy = ["mypy (0.780)"]
+checkqa_mypy = ["mypy (==0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
+version = "2.10.0"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.10.0"
 
 [package.dependencies]
 coverage = ">=4.4"
 pytest = ">=4.6"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
 
 [[package]]
-category = "dev"
-description = "pytest plugin to check FLAKE8 requirements"
 name = "pytest-flake8"
+version = "1.0.6"
+description = "pytest plugin to check FLAKE8 requirements"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.6"
 
 [package.dependencies]
 flake8 = ">=3.5"
 pytest = ">=3.5"
 
 [[package]]
-category = "dev"
-description = "Invoke py.test as distutils command with dependency resolution"
 name = "pytest-runner"
+version = "5.2"
+description = "Invoke py.test as distutils command with dependency resolution"
+category = "dev"
 optional = false
 python-versions = ">=2.7"
-version = "5.2"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs", "pytest-flake8", "pytest-black-multipy", "pytest-cov", "pytest-virtualenv"]
+testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs", "pytest-flake8", "pytest-black-multipy", "pytest-cov", "pytest-virtualenv"]
 
 [[package]]
-category = "main"
-description = "Extensions to the standard Python datetime module"
 name = "python-dateutil"
+version = "2.7.5"
+description = "Extensions to the standard Python datetime module"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.7.5"
 
 [package.dependencies]
 six = ">=1.5"
 
 [[package]]
-category = "dev"
-description = "World timezone definitions, modern and historical"
 name = "pytz"
+version = "2018.9"
+description = "World timezone definitions, modern and historical"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "2018.9"
 
 [[package]]
-category = "dev"
-description = "YAML parser and emitter for Python"
 name = "pyyaml"
+version = "5.1"
+description = "YAML parser and emitter for Python"
+category = "dev"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "5.1"
 
 [[package]]
-category = "main"
-description = "A Python library for OAuth 1.0/a, 2.0, and Ofly."
 name = "rauth"
+version = "0.7.3"
+description = "A Python library for OAuth 1.0/a, 2.0, and Ofly."
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.7.3"
 
 [package.dependencies]
 requests = ">=1.2.3"
 
 [[package]]
-category = "main"
-description = "Python HTTP for Humans."
 name = "requests"
+version = "2.24.0"
+description = "Python HTTP for Humans."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.24.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
@@ -480,26 +467,26 @@ urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
-category = "main"
-description = "Persistent cache for requests library"
 name = "requests-cache"
+version = "0.5.2"
+description = "Persistent cache for requests library"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.5.2"
 
 [package.dependencies]
 requests = ">=1.1.0"
 
 [[package]]
-category = "dev"
-description = "A utility library for mocking out the `requests` Python library."
 name = "responses"
+version = "0.10.15"
+description = "A utility library for mocking out the `requests` Python library."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.10.15"
 
 [package.dependencies]
 requests = ">=2.0"
@@ -509,40 +496,39 @@ six = "*"
 tests = ["coverage (>=3.7.1,<5.0.0)", "pytest-cov", "pytest-localserver", "flake8", "pytest (>=4.6,<5.0)", "pytest"]
 
 [[package]]
-category = "main"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.14.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.14.0"
 
 [[package]]
-category = "dev"
-description = "This package provides 16 stemmer algorithms (15 + Poerter English stemmer) generated from Snowball algorithms."
 name = "snowballstemmer"
+version = "1.2.1"
+description = "This package provides 16 stemmer algorithms (15 + Poerter English stemmer) generated from Snowball algorithms."
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.2.1"
 
 [[package]]
-category = "dev"
-description = "Python documentation generator"
 name = "sphinx"
+version = "3.1.2"
+description = "Python documentation generator"
+category = "dev"
 optional = true
 python-versions = ">=3.5"
-version = "3.1.2"
 
 [package.dependencies]
-Jinja2 = ">=2.3"
-Pygments = ">=2.0"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
-colorama = ">=0.3.5"
+colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
 docutils = ">=0.12"
 imagesize = "*"
+Jinja2 = ">=2.3"
 packaging = "*"
+Pygments = ">=2.0"
 requests = ">=2.5.0"
-setuptools = "*"
 snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
 sphinxcontrib-devhelp = "*"
@@ -557,12 +543,12 @@ lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-s
 test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
 
 [[package]]
-category = "dev"
-description = "Read the Docs theme for Sphinx"
 name = "sphinx-rtd-theme"
+version = "0.5.1"
+description = "Read the Docs theme for Sphinx"
+category = "dev"
 optional = true
 python-versions = "*"
-version = "0.5.0"
 
 [package.dependencies]
 sphinx = "*"
@@ -571,86 +557,86 @@ sphinx = "*"
 dev = ["transifex-client", "sphinxcontrib-httpdomain", "bump2version"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-applehelp"
+version = "1.0.1"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-devhelp"
+version = "1.0.1"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-htmlhelp"
+version = "1.0.1"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy", "html5lib"]
 
 [[package]]
-category = "dev"
-description = "A sphinx extension which renders display math in HTML via JavaScript"
 name = "sphinxcontrib-jsmath"
+version = "1.0.1"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+category = "dev"
 optional = true
 python-versions = ">=3.5"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-qthelp"
+version = "1.0.2"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.0.2"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-serializinghtml"
+version = "1.1.1"
+description = ""
+category = "dev"
 optional = true
 python-versions = "*"
-version = "1.1.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.0"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.0"
 
 [[package]]
-category = "dev"
-description = "Building newsfiles for your project."
 name = "towncrier"
+version = "19.2.0"
+description = "Building newsfiles for your project."
+category = "dev"
 optional = true
 python-versions = "*"
-version = "19.2.0"
 
 [package.dependencies]
 Click = "*"
@@ -659,16 +645,17 @@ jinja2 = "*"
 toml = "*"
 
 [[package]]
-category = "dev"
-description = "tox is a generic virtualenv management and test command line tool"
 name = "tox"
+version = "3.19.0"
+description = "tox is a generic virtualenv management and test command line tool"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "3.19.0"
 
 [package.dependencies]
-colorama = ">=0.4.1"
+colorama = {version = ">=0.4.1", markers = "platform_system == \"Windows\""}
 filelock = ">=3.0.0"
+importlib-metadata = {version = ">=0.12,<2", markers = "python_version < \"3.8\""}
 packaging = ">=14"
 pluggy = ">=0.12.0"
 py = ">=1.4.17"
@@ -676,48 +663,41 @@ six = ">=1.14.0"
 toml = ">=0.9.4"
 virtualenv = ">=16.0.0,<20.0.0 || >20.0.0,<20.0.1 || >20.0.1,<20.0.2 || >20.0.2,<20.0.3 || >20.0.3,<20.0.4 || >20.0.4,<20.0.5 || >20.0.5,<20.0.6 || >20.0.6,<20.0.7 || >20.0.7"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12,<2"
-
 [package.extras]
 docs = ["pygments-github-lexers (>=0.0.5)", "sphinx (>=2.0.0)", "sphinxcontrib-autoprogram (>=0.1.5)", "towncrier (>=18.5.0)"]
 testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "pathlib2 (>=2.3.3)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "pytest-xdist (>=1.22.2)"]
 
 [[package]]
-category = "main"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
 name = "urllib3"
+version = "1.24.2"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4"
-version = "1.24.2"
 
 [package.extras]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
-category = "dev"
-description = "Virtual Python Environment builder"
 name = "virtualenv"
+version = "16.2.0"
+description = "Virtual Python Environment builder"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "16.2.0"
-
-[package.dependencies]
-setuptools = ">=18.0.0"
 
 [package.extras]
 docs = ["sphinx (>=1.8.0,<2)", "towncrier (>=18.5.0)", "sphinx-rtd-theme (>=0.4.2,<1)"]
 testing = ["pytest (>=4.0.0,<5)", "coverage (>=4.5.0,<5)", "six (>=1.10.0,<2)", "pytest-timeout (>=1.3.0,<2)", "pytest-xdist", "mock", "xonsh"]
 
 [[package]]
-category = "dev"
-description = "Backport of pathlib-compatible object wrapper for zip files"
 name = "zipp"
+version = "0.5.2"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "dev"
 optional = false
 python-versions = ">=2.7"
-version = "0.5.2"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
@@ -730,8 +710,9 @@ pre-commit = []
 travis-ci = []
 
 [metadata]
-content-hash = "671fad780d36ac7dc6dd10cd30638e640854b88b001b0adff8f0d5b4d3f73d1c"
+lock-version = "1.1"
 python-versions = "^3.6"
+content-hash = "80abcfc5684e8edf687348be520c94fa7c9aa17b9111103b4d892742c8d2d553"
 
 [metadata.files]
 alabaster = [
@@ -1010,8 +991,8 @@ sphinx = [
     {file = "Sphinx-3.1.2.tar.gz", hash = "sha256:b9daeb9b39aa1ffefc2809b43604109825300300b987a24f45976c001ba1a8fd"},
 ]
 sphinx-rtd-theme = [
-    {file = "sphinx_rtd_theme-0.5.0-py2.py3-none-any.whl", hash = "sha256:373413d0f82425aaa28fb288009bf0d0964711d347763af2f1b65cafcb028c82"},
-    {file = "sphinx_rtd_theme-0.5.0.tar.gz", hash = "sha256:22c795ba2832a169ca301cd0a083f7a434e09c538c70beb42782c073651b707d"},
+    {file = "sphinx_rtd_theme-0.5.1-py2.py3-none-any.whl", hash = "sha256:fa6bebd5ab9a73da8e102509a86f3fcc36dec04a0b52ea80e5a033b2aba00113"},
+    {file = "sphinx_rtd_theme-0.5.1.tar.gz", hash = "sha256:eda689eda0c7301a80cf122dad28b1861e5605cbf455558f3775e1e8200e83a5"},
 ]
 sphinxcontrib-applehelp = [
     {file = "sphinxcontrib-applehelp-1.0.1.tar.gz", hash = "sha256:edaa0ab2b2bc74403149cb0209d6775c96de797dfd5b5e2a71981309efab3897"},
diff --git a/pyproject.toml b/pyproject.toml
index b981cdc..ba1d915 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ pytest-runner = "^5.2"
 towncrier = {version = "^19.2", optional = true}
 tox = "^3.19"
 sphinx = {version = "^3.1", optional = true}
-sphinx_rtd_theme = {version = "^0.5.0", optional = true}
+sphinx_rtd_theme = {version = "^0.5.1", optional = true}
 pre-commit = {version = "^2.1", optional = true}
 
 [tool.poetry.extras]