Improve test coverage ⬆️ 🧪

[jamacku]

• Unit tests
  • config.ts
  • metadata.ts
  • pull-request.ts
  • tag.ts
  • validation-feedback.ts
• Integration tests

[codecov]

Codecov Report

Merging #54 (f95b8b4) into main (d4b3a35) will increase coverage by 4.80%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
+ Coverage   49.42%   54.23%   +4.80%     
==========================================
  Files           5        5              
  Lines         437      437              
  Branches       37       47      +10     
==========================================
+ Hits          216      237      +21     
+ Misses        221      200      -21     

Impacted Files	Coverage Δ
src/config.ts	84.07% <100.00%> (+8.84%)	⬆️
src/metadata.ts	36.09% <100.00%> (+3.00%)	⬆️
src/tag.ts	66.66% <0.00%> (+19.44%)	⬆️

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