Update dependency requests to v2.25.0

[mend-for-github-com]

This PR contains the following updates:

Package	Update	Change
requests (source, changelog)	minor	==2.20.0 -> ==2.25.0

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	7.5	CVE-2021-33503	#403

---

Release Notes

psf/requests (requests)

v2.25.0

Compare Source

Improvements

• Added support for NETRC environment variable. (#​5643)

Dependencies

• Requests now supports urllib3 v1.26.

Deprecations

• Requests v2.25.x will be the last release series with support for Python 3.5.
• The requests[security] extra is officially deprecated and will be removed
  in Requests v2.26.0.

v2.24.0

Compare Source

Improvements

• pyOpenSSL TLS implementation is now only used if Python
  either doesn't have an ssl module or doesn't support
  SNI. Previously pyOpenSSL was unconditionally used if available.
  This applies even if pyOpenSSL is installed via the
  requests[security] extra (#​5443)

• Redirect resolution should now only occur when
  allow_redirects is True. (#​5492)

• No longer perform unnecessary Content-Length calculation for
  requests that won't use it. (#​5496)

v2.23.0

Compare Source

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 every time a dependency is updated.

v2.22.0

Compare Source

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.

v2.21.0

Compare Source

Dependencies

• Requests now supports idna v2.8.

v2.20.1

Compare Source

Bugfixes

• Fixed bug with unintended Authorization header stripping for
  redirects using default ports (http/80, https/443).

---

• If you want to rebase/retry this PR, check this box