Update the PHP CS Fixer configuration

[mspirkov]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.66%. Comparing base (40d78e9) to head (ccfecfe).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #479   +/-   ##
=========================================
  Coverage     96.66%   96.66%           
  Complexity      402      402           
=========================================
  Files            66       66           
  Lines          1198     1198           
=========================================
  Hits           1158     1158           
  Misses           40       40           

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