Release 1.2.0b2

[kasteph]

Added

• Added support for multiple-constraint direct origin dependencies with the same
  version (#5715)
• Added support disabling TLS verification for custom package sources via poetry config certificates.<repository>.cert false (#5719
• Added new configuration (virtualenvs.prompt) to customize the prompt of the Poetry-managed virtual environment (#5606)
• Added progress indicator to download_file (used when downloading dists) (#5451)
• Added --dry-run to poetry version command (#5603)
• Added --why to poetry show (#5444)
• Added support for single page (html) repositories (#5517)
• Added support for PEP 508 strings when adding
  dependencies via poetry add command (#5554)
• Added --no-cache as a global option (#5519)
• Added cert retrieval for HTTP requests made by Poetry (#5320)
• Added --skip-existing to poetry publish (#2812)
• Added --all-extras to poetry install (#5452)
• Added new poetry self sub-commands to manage plugins and/or system environment packages, eg: keyring backends (#5450)
• Added new configuration (installer.no-binary) to allow selection of non-binary distributions when installing a dependency (#5609)

Changed

• poetry plugin commands are now deprecated in favor of the more generic poetry self
  commands (#5450)
• When creating new projects, Poetry no longer restricts README extensions to md and rst (#5357)
• Changed the provider to allow fallback to installed packages (#5704)
• Solver now correctly handles and prefers direct reference constraints (vcs, file etc.) over public version identifiers (#5654)
• Changed the build script behavior to create an ephemeral build environment when a build script is
  specified (#5401)
• Improved performance when determining PEP 517 metadata from sources (#5601)
• Project package sources no longer need to be redefined as global repositories when configuring credentials (#5563)
• Replaced external git command use with dulwich, in order to force the legacy behaviour set experimental.system-git-client configuration to true (#5428)
• Improved http request handling for sources and multiple paths on same netloc (#5518)
• Made no-pip and no-setuptools configuration explicit (#5455)
• Improved application logging, use of -vv now provides more debug information (#5503)
• Renamed implicit group default to main (#5465)
• Replaced in-tree implementation of poetry export
  with poetry-plugin-export (#5413)
• Changed the password manager behavior to use a "null" keyring when
  disabled (#5251)
• Incremental improvement of Solver performance (#5335)
• Newly created virtual environments on macOS now are excluded from Time Machine backups (#4599)
• Poetry no longer raises an exception when a package is not found on PyPI (#5698)
• Update packaging dependency to use major version 21, this change forces Poetry to drop support for managing Python 2.7 environments (#4749)

Fixed

• Fixed poetry update --dry-run to not modify poetry.lock (#5718, #3666, #3766)
• Fixed #5537 where export fails to resolve dependencies with more than one
  path (#5688)
• Fixed an issue where the environment variables POETRY_CONFIG_DIR and POETRY_CACHE_DIR were not being respected (#5672)
• Fixed #3628 and #4702 by handling invalid distributions
  gracefully (#5645)
• Fixed an issue where the provider ignored subdirectory when merging and improve subdirectory support for vcs
  deps (#5648)
• Fixed an issue where users could not select an empty choice when selecting
  dependencies (#4606)
• Fixed an issue where poetry init -n crashes in a root directory (#5612)
• Fixed an issue where Solver errors arise due to wheels having different Python
  constraints (#5616)
• Fixed an issue where editable path dependencies using setuptools could not be correctly installed (#5590)
• Fixed flicker when displaying executor operations (#5556)
• Fixed an issue where the poetry lock --no-update only sorted by name and not by name and
  version (#5446)
• Fixed an issue where the Solver fails when a dependency has multiple constrained dependency definitions for the same
  package (#5403)
• Fixed an issue where dependency resolution takes a while because Poetry checks all possible combinations
  even markers are mutually exclusive (#4695)
• Fixed incorrect version selector constraint (#5500)
• Fixed an issue where poetry lock --no-update dropped
  packages (#5435)
• Fixed an issue where packages were incorrectly grouped when
  exporting (#5156)
• Fixed an issue where lockfile always updates when using private
  sources (#5362)
• Fixed an issue where the solver did not account for selected package features (#5305)
• Fixed an issue with console script execution of editable dependencies on Windows (#3339)
• Fixed an issue where editable builder did not write PEP-610 metadata (#5703)
• Fixed an issue where Poetry 1.1 lock files were incorrectly identified as not fresh (#5458)

Docs

• Updated plugin management commands (#5450)
• Added the --readme flag to documentation (#5357)
• Added example for multiple maintainers (#5661)
• Updated documentation for issues #4800, #3709, #3573, #2211 and #2414 (#5656)
• Added poetry.toml note in configuration (#5492)
• Add documentation for poetry about, poetry help, poetrylist, and the --full-path and --all options
  documentation (#5664)
• Added more clarification to the --why flag (#5653)
• Updated documentation to refer to PowerShell for Windows, including
  instructions (#3978, #5618)
• Added PEP 508 name requirement (#5642)
• Added example for each section of pyproject.toml (#5585)
• Added documentation for --local to fix issue #5623 (#5629)
• Added troubleshooting documentation for using proper quotation with
  ZSH (#4847)
• Added information on git and basic http auth (#5578)
• Removed ambiguity about PEP 440 and semver (#5576)
• Removed Pipenv comparison (#5561)
• Improved dependency group related documentation (#5338)
• Added documentation for default directories used by Poetry (#5391)
• Added warning about credentials preserved in shell history (#5726)
• Improved documentation of the readme option, including multiple files and additional formats (#5158)
• Improved contributing documentation (#5708)
• Remove all references to --dev-only option (#5771)

[finswimmer]

Thanks for preparing the changelog so quickly @kasteph 🎉 👍 🥇

I don't think it is necessary to mention version bumps of dependencies, unless they introduce (important) changes to poetry.

To complete this release, the version in pyproject.toml must be bumped as well.

[abn]

Let's lock core here too. This is because we have a few changes in the next release that might not work with this pre-release.

[sdispater]

We should define a standard order of change log sections that we stick with.

From the start of Poetry I always tried to stick to:

1. Added
2. Changed
3. Fixed
4. Docs

The rationale behind that is that I want to notify about new features and changes first.

[neersighted]

LGTM

stale

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