fix: Modify setup.py to indicate this is google maintained

[crwilcox]

Feel free to reject this, but I found it odd that an individual Googler is the author, as most of our packages specify Google as the author.

Also adds 3.8 trove classifier.

[codecov]

Codecov Report

Merging #45 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #45   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           20        20           
  Lines          771       771           
  Branches       134       134           
=========================================
  Hits           771       771           

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