Python support eol

[ArieLevs]

python 3.6 (official only) support drop, python 3.6 (and older) will probably still work

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 95.37%. Comparing base (e4bc609) to head (7d18272).
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/pybump.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
- Coverage   95.56%   95.37%   -0.20%     
==========================================
  Files           5        5              
  Lines         451      454       +3     
==========================================
+ Hits          431      433       +2     
- Misses         20       21       +1     

Flag	Coverage Δ
unittests	95.37% <57.14%> (-0.20%)	⬇️

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