Python Version and OS conditions

[sadrasabouri]

• Version Check is now just tested on python 3.7
• Other tests are now just tested on python 3.7
• CodeCov working on python 3.7 and Ubuntu-latest
• requirements-splitter.py added

[codecov-io]

Codecov Report

Merging #37 (44d3b03) into dev (15e959c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev      #37   +/-   ##
=======================================
  Coverage   95.66%   95.66%           
=======================================
  Files           2        2           
  Lines         161      161           
  Branches       18       18           
=======================================
  Hits          154      154           
  Misses          4        4           
  Partials        3        3           

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[sepandhaghighi]

LGTM 💯