py-requests: updated to 2.27.1

2.27.1 (2022-01-05)
-------------------

**Bugfixes**

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

2.27.0 (2022-01-03)
-------------------

**Improvements**

- Officially added support for Python 3.10.

- 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.

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

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

**Bugfixes**

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

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

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

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

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

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

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

**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.


(adam)