Add pypy versions support

[pauloxnet]

No description provided.

[codecov]

Codecov Report

Merging #321 (449d283) into master (dcce8bc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #321   +/-   ##
=======================================
  Coverage   90.08%   90.08%           
=======================================
  Files          27       27           
  Lines        1210     1210           
  Branches      186      186           
=======================================
  Hits         1090     1090           
  Misses         89       89           
  Partials       31       31           

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