Use github-url-detection

[kidonng]

github-url-detection is extracted from the Refined GitHub so there is no need to use copied code anymore.

[codecov-commenter]

Codecov Report

Merging #26 into master will decrease coverage by 0.53%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
- Coverage   16.79%   16.26%   -0.54%     
==========================================
  Files          19       19              
  Lines         393      369      -24     
  Branches       53       50       -3     
==========================================
- Hits           66       60       -6     
+ Misses        325      307      -18     
  Partials        2        2              

Impacted Files	Coverage Δ
packages/content/utils/PageDetect.ts	77.77% <50.00%> (+36.60%)	⬆️
packages/content/pages/GistGitHub.ts	37.50% <100.00%> (ø)
packages/content/pages/GitHub.ts	15.62% <100.00%> (+1.33%)	⬆️

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[kidonng]

@kidonng this is already part of #27, Am I right ?

This is not included in #27 because it's a minimal change.

[dderevjanik]

sorry I misread that