Adding CodeCov integration

[wkerzendorf]

No description provided.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@08bbc01). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #865   +/-   ##
=========================================
  Coverage          ?   82.26%           
=========================================
  Files             ?       34           
  Lines             ?     2870           
  Branches          ?        0           
=========================================
  Hits              ?     2361           
  Misses            ?      509           
  Partials          ?        0

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