ci: adding test stats

[elliotchance]

This change is 

[codecov-io]

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The diff coverage is n/a.

@@           Coverage Diff           @@
##             master    #82   +/-   ##
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  Coverage          ?   100%           
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  Files             ?      7           
  Lines             ?    690           
  Branches          ?      0           
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  Hits              ?    690           
  Misses            ?      0           
  Partials          ?      0

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