Support older versions of urllib3

[jsignell]

Related Issue(s):

• Closes Support older versions of urllib3 #1579

Description:

This is a really simple tweak that supports v1 of urllib3.

PR Checklist:

• Pre-commit hooks pass (run pre-commit run --all-files)
• Tests pass (run pytest)
• Documentation has been updated to reflect changes, if applicable
• This PR maintains or improves overall codebase code coverage.
• Changes are added to the CHANGELOG. See the docs for information about adding to the changelog.

[jsignell]

To test this change I set this to "urllib3==1.26.19", locally and ran tests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.38%. Comparing base (44d06af) to head (1df2630).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1580   +/-   ##
=======================================
  Coverage   92.38%   92.38%           
=======================================
  Files          55       55           
  Lines        8374     8375    +1     
  Branches      965      965           
=======================================
+ Hits         7736     7737    +1     
  Misses        453      453           
  Partials      185      185           

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