Fix codecov setup

[codecov-io]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@580ab73). Click here to learn what that means. The diff coverage is n/a.

@@           Coverage Diff           @@
##             master    #22   +/-   ##
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  Coverage          ?   100%           
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  Files             ?      1           
  Lines             ?     10           
  Branches          ?      0           
=======================================
  Hits              ?     10           
  Misses            ?      0           
  Partials          ?      0

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[vhirtham]

Here is an overview of what got changed by this pull request:

Complexity decreasing per file
==============================
+ tests/test_my_funcs.py  -1

See the complete overview on Codacy