fix: urllib3 compatibility < v2

[evansims]

Description

• Bumped dependency requirements for urllib3 to specify >= v1.26.19 or >= v2.2.2
• Modified type hints in RESTResponse class to use urllib3.HTTPResponse instead of urllib3.BaseHTTPResponse
• Added matrix testing for different urllib3 versions in GitHub Actions workflow

References

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.42%. Comparing base (e07ce96) to head (358f7a7).

❌ Your project status has failed because the head coverage (70.42%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@ Coverage Diff @@ ## main #179 +/- ## ======================================= Coverage 70.42% 70.42% ======================================= Files 134 134 Lines 10798 10798 ======================================= Hits 7605 7605 Misses 3193 3193 

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