Use packaging instead of pkg_resources

[ewu63]

Purpose

As explained here the parse_version method we use in pySNOPT is deprecated. Here I switched to the packaging package which is the recommended approach, see e.g. here.

Expected time until merged

1 day.

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

Testing

Checklist

• I have run flake8 and black to make sure the Python code adheres to PEP-8 and is consistently formatted
• I have formatted the Fortran code with fprettify or C/C++ code with clang-format as applicable
• I have run unit and regression tests which pass locally with my changes
• I have added new tests that prove my fix is effective or that my feature works
• I have added necessary documentation

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.92%. Comparing base (7e862db) to head (ee4b6aa).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pyoptsparse/pySNOPT/pySNOPT.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #412   +/-   ##
=======================================
  Coverage   74.92%   74.92%           
=======================================
  Files          22       22           
  Lines        3334     3334           
=======================================
  Hits         2498     2498           
  Misses        836      836           

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[marcomangano]

Neat

[ewu63]

bump @lamkina