ci: add support for phpstan #84

[lotyp]

Closes: #84

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 23.99%. Comparing base (5884f2c) to head (c862bbc).

:exclamation: Current head c862bbc differs from pull request most recent head 870f3f8. Consider uploading reports for the commit 870f3f8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #86   +/-   ##
=========================================
  Coverage     23.99%   23.99%           
  Complexity     1122     1122           
=========================================
  Files           129      129           
  Lines          3397     3397           
=========================================
  Hits            815      815           
  Misses         2582     2582           

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.