Enhancement: Enable and configure types_spaces fixer

[localheinz]

This pull request

• enables and configures the types_spaces fixer

Follows #475.

💁‍♂️ For reference, see https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/v3.1.0/doc/rules/whitespace/types_spaces.rst.

[codecov]

Codecov Report

Merging #478 (2db54a5) into main (d644c57) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main      #478   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         7         7           
===========================================
  Files              2         2           
  Lines             26        26           
===========================================
  Hits              26        26           

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