Fix: Use caret operator

[localheinz]

This PR

• uses the ^ operator for stable dependencies

[codecov]

Codecov Report

Merging #149 into main will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #149   +/-   ##
=========================================
  Coverage     98.92%   98.92%           
  Complexity       58       58           
=========================================
  Files            14       14           
  Lines           186      186           
=========================================
  Hits            184      184           
  Misses            2        2           

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