Scheduled monthly dependency update for October

[pyup-bot]

Update requests from 2.19.1 to 2.22.0.

Changelog

### 2.22.0 ``` ------------------- **Dependencies** - Requests now supports urllib3 v1.25.2. (note: 1.25.0 and 1.25.1 are incompatible) **Deprecations** - Requests has officially stopped support for Python 3.4. ``` ### 2.21.0 ``` ------------------- **Dependencies** - Requests now supports idna v2.8. ``` ### 2.20.1 ``` ------------------- **Bugfixes** - Fixed bug with unintended Authorization header stripping for redirects using default ports (http/80, https/443). ``` ### 2.20.0 ``` ------------------- **Bugfixes** - Content-Type header parsing is now case-insensitive (e.g. charset=utf8 v Charset=utf8). - Fixed exception leak where certain redirect urls would raise uncaught urllib3 exceptions. - Requests removes Authorization header from requests redirected from https to http on the same hostname. (CVE-2018-18074) - `should_bypass_proxies` now handles URIs without hostnames (e.g. files). **Dependencies** - Requests now supports urllib3 v1.24. **Deprecations** - Requests has officially stopped support for Python 2.6. ```

Links

- PyPI: https://pypi.org/project/requests - Changelog: https://pyup.io/changelogs/requests/ - Homepage: http://python-requests.org

[coveralls]

Coverage remained the same at 100.0% when pulling cc988514b7a6ae5c76369e238ac7a6ec0ff9e5b9 on pyup-scheduled-update-2019-10-01 into fc0900179c199afc90a0ae3883cd0278c573b013 on master.

[pyup-bot]

Closing this in favor of #72