Add code coverage

[Banana1530]

No description provided.

[michaelweylandt]

Looks fantastic - any reason not to merge as soon as the build finishes?

[michaelweylandt]

👍

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@cc9be2e). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #49   +/-   ##
=========================================
  Coverage          ?   90.22%           
=========================================
  Files             ?       30           
  Lines             ?     2016           
  Branches          ?        0           
=========================================
  Hits              ?     1819           
  Misses            ?      197           
  Partials          ?        0

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