Update requests to 2.27.1

[pyup-bot]

This PR updates requests from 2.25.1 to 2.27.1.

Changelog

2.27.1

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

**Bugfixes**

- Fixed parsing issue that resulted in the `auth` component being
dropped from proxy URLs. (6028)

2.27.0

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

**Improvements**

- Officially added support for Python 3.10. (5928)

- Added a `requests.exceptions.JSONDecodeError` to unify JSON exceptions between
Python 2 and 3. This gets raised in the `response.json()` method, and is
backwards compatible as it inherits from previously thrown exceptions.
Can be caught from `requests.exceptions.RequestException` as well. (5856)

- Improved error text for misnamed `InvalidSchema` and `MissingSchema`
exceptions. This is a temporary fix until exceptions can be renamed
(Schema->Scheme). (6017)

- Improved proxy parsing for proxy URLs missing a scheme. This will address
recent changes to `urlparse` in Python 3.9+. (5917)

**Bugfixes**

- Fixed defect in `extract_zipped_paths` which could result in an infinite loop
for some paths. (5851)

- Fixed handling for `AttributeError` when calculating length of files obtained
by `Tarfile.extractfile()`. (5239)

- Fixed urllib3 exception leak, wrapping `urllib3.exceptions.InvalidHeader` with
`requests.exceptions.InvalidHeader`. (5914)

- Fixed bug where two Host headers were sent for chunked requests. (5391)

- Fixed regression in Requests 2.26.0 where `Proxy-Authorization` was
incorrectly stripped from all requests sent with `Session.send`. (5924)

- Fixed performance regression in 2.26.0 for hosts with a large number of
proxies available in the environment. (5924)

- Fixed idna exception leak, wrapping `UnicodeError` with
`requests.exceptions.InvalidURL` for URLs with a leading dot (.) in the
domain. (5414)

**Deprecations**

- Requests support for Python 2.7 and 3.6 will be ending in 2022. While we
don't have exact dates, Requests 2.27.x is likely to be the last release
series providing support.

2.26.0

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

**Improvements**

- Requests now supports Brotli compression, if either the `brotli` or
`brotlicffi` package is installed. (5783)

- `Session.send` now correctly resolves proxy configurations from both
the Session and Request. Behavior now matches `Session.request`. (5681)

**Bugfixes**

- Fixed a race condition in zip extraction when using Requests in parallel
from zip archive. (5707)

**Dependencies**

- Instead of `chardet`, use the MIT-licensed `charset_normalizer` for Python3
to remove license ambiguity for projects bundling requests. If `chardet`
is already installed on your machine it will be used instead of `charset_normalizer`
to keep backwards compatibility. (5797)

You can also install `chardet` while installing requests by
specifying `[use_chardet_on_py3]` extra as follows:

 shell
 pip install "requests[use_chardet_on_py3]"
 

Python2 still depends upon the `chardet` module.

- Requests now supports `idna` 3.x on Python 3. `idna` 2.x will continue to
be used on Python 2 installations. (5711)

**Deprecations**

- The `requests[security]` extra has been converted to a no-op install.
PyOpenSSL is no longer the recommended secure option for Requests. (5867)

- Requests has officially dropped support for Python 3.5. (5867)

Links

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

[coveralls]

Coverage remained the same at 86.413% when pulling 56882ff on pyup-update-requests-2.25.1-to-2.27.1 into 2716a32 on master.

[pyup-bot]

Closing this in favor of #434