Code Coverage Fix

[judtinzhang]

In addition to code coverage fixes, the following also needed to be updated to pass checks

• Migrating max length for major and minor name to 150 to accommodate for new majors added in 2023
• Upgrading black because of bad version
• Install backports.zoneinfo because of known issue (since platform is on python version < 3.9)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (daf9ff9) 97.87% compared to head (2402252) 96.99%.
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #164      +/-   ##
==========================================
- Coverage   97.87%   96.99%   -0.88%     
==========================================
  Files          15       15              
  Lines         799      799              
==========================================
- Hits          782      775       -7     
- Misses         17       24       +7     

Flag	Coverage Δ
backend	?

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Files	Coverage Δ
backend/accounts/backends.py	100.00% <100.00%> (ø)
backend/accounts/models.py	100.00% <100.00%> (ø)

... and 28 files with indirect coverage changes

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