introduce workflow for releasing new version

[SK1Y101]

uses bump2version to update version in setup.py, should allow manual triggering when needed

Includes some file formatting to allow extra linting & tests to pass

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.43%. Comparing base (bfe63cc) to head (9baee49).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #291   +/-   ##
=======================================
  Coverage   69.43%   69.43%           
=======================================
  Files          76       76           
  Lines        6024     6024           
  Branches     1347     1347           
=======================================
  Hits         4183     4183           
  Misses       1612     1612           
  Partials      229      229           

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