Replace StyleCI to PHP CS Fixer

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.62%. Comparing base (a89fba9) to head (4eb7708).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #257      +/-   ##
============================================
+ Coverage     98.59%   98.62%   +0.03%     
  Complexity      356      356              
============================================
  Files            47       47              
  Lines           927      948      +21     
============================================
+ Hits            914      935      +21     
  Misses           13       13              

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