Update requests to 2.23.0

[pyup-bot]

This PR updates requests from 2.22.0 to 2.23.0.

Changelog

2.23.0

-------------------

**Improvements**

- Remove defunct reference to `prefetch` in Session `__attrs__` (5110)

**Bugfixes**

- Requests no longer outputs password in basic auth usage warning. (5099)

**Dependencies**

- Pinning for `chardet` and `idna` now uses major version instead of minor.
This hopefully reduces the need for releases everytime a dependency is updated.

Links

• PyPI: https://pypi.org/project/requests
• Changelog: https://pyup.io/changelogs/requests/
• Docs: https://requests.readthedocs.io

[codecov-io]

Codecov Report

Merging #84 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #84   +/-   ##
=======================================
  Coverage   78.13%   78.13%           
=======================================
  Files           5        5           
  Lines         247      247           
=======================================
  Hits          193      193           
  Misses         54       54

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[pyup-bot]

Closing this in favor of #120