chore: Switch to PSR12

[ankitpokhrel]

Fixes #189

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@489671a). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #364   +/-   ##
=======================================
  Coverage        ?   99.68%           
  Complexity      ?      356           
=======================================
  Files           ?       20           
  Lines           ?      952           
  Branches        ?        0           
=======================================
  Hits            ?      949           
  Misses          ?        3           
  Partials        ?        0           

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