Fix: Laxify schema in place

[localheinz]

This PR

• laxifies the schema in place

Fixes #417.

[codecov]

Codecov Report

Merging #424 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #424   +/-   ##
=========================================
  Coverage     80.92%   80.92%           
  Complexity       41       41           
=========================================
  Files             4        4           
  Lines           194      194           
=========================================
  Hits            157      157           
  Misses           37       37           

Impacted Files	Coverage Δ	Complexity Δ
src/NormalizePlugin.php	64.28% <100.00%> (ø)	5.00 <0.00> (ø)

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