DEP: Remove distutils dependency

[snowman2]

• Closes DEP: distutils is deprecated #916
• Fully documented, including history.rst for all changes and api/*.rst for new API

[codecov]

Codecov Report

Merging #917 (c36d82e) into master (7eaf816) will decrease coverage by 0.03%.
The diff coverage is 90.90%.

@@            Coverage Diff             @@
##           master     #917      +/-   ##
==========================================
- Coverage   96.23%   96.19%   -0.04%     
==========================================
  Files          21       21              
  Lines        1754     1763       +9     
==========================================
+ Hits         1688     1696       +8     
- Misses         66       67       +1     

Impacted Files	Coverage Δ
pyproj/utils.py	82.53% <85.71%> (+0.39%)	⬆️
pyproj/datadir.py	100.00% <100.00%> (ø)

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