Enhancement: Implement Specification::never()

[localheinz]

This pull request

• implements Specification::never()

[codecov]

Codecov Report

Merging #57 (375a3b1) into main (793cba5) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 375a3b1 differs from pull request most recent head 3811721. Consider uploading reports for the commit 3811721 to get more accurate results

@@             Coverage Diff             @@
##                main       #57   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity        37        38    +1     
===========================================
  Files              5         5           
  Lines            101       104    +3     
===========================================
+ Hits             101       104    +3     

Impacted Files	Coverage Δ
src/Specification.php	100.00% <100.00%> (ø)

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