fix: add pixelmatch to special case list

[Ethan-Arrowood]

Adds unit and integration tests for the pixelmatch package which requires a special case for including the bin directory to correctly trace the dependency pngjs

Fixes a playwright bug https://github.com/microsoft/playwright/blob/7f513360681d2517caa24d266def9b3a7be4f469/packages/playwright-core/src/utils/comparators.ts#L23-L24

[codecov]

Codecov Report

Merging #281 (1858950) into main (cb5f3f9) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #281      +/-   ##
==========================================
+ Coverage   80.65%   80.68%   +0.02%     
==========================================
  Files          13       13              
  Lines        1463     1465       +2     
  Branches      544      545       +1     
==========================================
+ Hits         1180     1182       +2     
  Misses        116      116              
  Partials      167      167              

Impacted Files	Coverage Δ
src/utils/special-cases.ts	87.23% <100.00%> (+0.27%)	⬆️

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more

[styfle]

Thanks!

[styfle]

For posterity: this fixes a playwright bug:

https://github.com/microsoft/playwright/blob/7f513360681d2517caa24d266def9b3a7be4f469/packages/playwright-core/src/utils/comparators.ts#L23-L24