Replace Psalm with PHPstan

[tvdijen]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 0.77%. Comparing base (d8d955a) to head (06bbbd4).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##             master     #27   +/-   ##
========================================
  Coverage      0.77%   0.77%           
+ Complexity      156     155    -1     
========================================
  Files             7       7           
  Lines          2057    2057           
========================================
  Hits             16      16           
  Misses         2041    2041           

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