Don't run CI on push to branch

[odow]

We don't need to run CI twice

[codecov]

Codecov Report

Merging #50 (e287ad9) into master (48303fe) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #50   +/-   ##
=======================================
  Coverage   85.76%   85.76%           
=======================================
  Files           4        4           
  Lines         583      583           
=======================================
  Hits          500      500           
  Misses         83       83           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 48303fe...e287ad9. Read the comment docs.