Requests-aws4auth

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**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'

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**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.

=========

**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

=========

**New features**

- none

**Package changes**

- bump to proper X.Y.Z semver syntax
- bump project to stable (33)

**Tests**

- none

=========

**New features**

- none!

**Package changes**

- add flake8 config
- convert docs to markdown
- Removed bundled six.py.
- Taken over ownership via [PEP451](https://www.python.org/dev/peps/pep-0541/#continue-maintenance); [pypi issue here](https://github.com/pypa/pypi-support/issues/393), [successfully contacted Sam](https://github.com/sam-washington/requests-aws4auth/issues/40).

**Tests**

- remove sys path hacking from tests.
- Ensure they work now.
- Github Actions are in place for continuous integration.
- Allow longer flake8 line length in tests.

================

**New features**

- Support for STS temporary credentials. Thanks to
<https://github.com/magdalene>

**Tests**

- Tests for the STS temporary credentials functionality
- Fixed `AWS4SigningKey.amz_date` deprecation warning test
- Elastic MapReduce live service test no longer using deprecated DescribeJobFlows action