Add GitHub actions

[RJMW]

No description provided.

[codecov]

Codecov Report

Merging #18 (1e613ad) into dev (e838ece) will increase coverage by 1.56%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev      #18      +/-   ##
==========================================
+ Coverage   80.57%   82.13%   +1.56%     
==========================================
  Files           7        6       -1     
  Lines         947      929      -18     
==========================================
  Hits          763      763              
+ Misses        184      166      -18     

Flag	Coverage Δ
unittests	82.13% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
msnpy/convert.py	70.35% <100.00%> (ø)
msnpy/__main__.py

---

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 e838ece...1e613ad. Read the comment docs.