Use PHP version set instead of migration sets

[zingimmick]

No description provided.

[codecov]

Codecov Report

Merging #9 (55bd4f0) into master (8c41f10) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##              master        #9   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         5         5           
===========================================
  Files              1         1           
  Lines             26        26           
===========================================
  Hits              26        26           

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