Update requests-aws4auth to 1.2.2

[pyup-bot]

This PR updates requests-aws4auth from 1.0.1 to 1.2.2.

Changelog

1.1.2

=========

**Changes**

- don't install markdown files, and especially not outside of our lib dir, see 51. Thanks benjaminp.
- prevent unquoting of query string reserved characters, see 60. Thanks mliarakos.
- Add support for files as request body, see see 58. Thanks USSRLivesOn.
- remove deprecated python 2.7 and python 3.5. Currently testing against 3.8 and 3.9.
- renamed main branch to 'main'

1.1.1

=========

**Bugfixes**

- secondary fix to query string ordering, documented in 49. It would fail with multiple values for the same key. Thanks martinamps.
- fix minor deprecation warning in a regex.

**Package changes**

- none

**Tests**

- Added tests for 49 secondary fix for string ordering.

1.1.0

=========

**New features**

- query string ordering has been fixed. Documented in 21, fixed in 23. Thanks zen4ever.
- test for spaces before calling shlex on them in `amz_norm_whitespace`. shlex doesn't like to split whitespace on a string without whitespace, taking several orders of magnitude longer to parse through it. 35, thanks noamkush.
- added `refreshable_credentials`, see 37, thanks teemuy.

**Package changes**

- Removed python2.7 support. Usage of py2.7 is not supported. `Requires-Python` will be set to py3.3+ in the next minor release.

**Tests**

- none

Links

• PyPI: https://pypi.org/project/requests-aws4auth
• Changelog: https://pyup.io/changelogs/requests-aws4auth/
• Repo: https://github.com/tedder/requests-aws4auth/tarball/1.2.2

[pyup-bot]

Closing this in favor of #104