ci: add code coverage

[arnaud-tincelin]

No description provided.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@a27f124). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head e7b11f0 differs from pull request most recent head e326719. Consider uploading reports for the commit e326719 to get more accurate results

@@           Coverage Diff            @@
##             master     #98   +/-   ##
========================================
  Coverage          ?   7.67%           
========================================
  Files             ?      12           
  Lines             ?     456           
  Branches          ?       0           
========================================
  Hits              ?      35           
  Misses            ?     416           
  Partials          ?       5           

---

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 a27f124...e326719. Read the comment docs.

[Tatsinnit]

👍