Fix URL validator bug

[JacobBennett]

Fixes #220

[codecov-io]

Codecov Report

Merging #221 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #221   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files          24       24           
  Lines         438      438           
=======================================
  Hits          436      436           
  Misses          2        2

Impacted Files	Coverage Δ
src/validators/url.js	100% <100%> (ø)	⬆️

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[Frizi]

I don't think case insensitve regex is a good idea. Mixed casing in protocols is one reason. See comments on #220 for details. This fix will also need some test coverage for sure.

[JacobBennett]

Updated #220 with additional details.

[Frizi]

I'm convinced it's a good solution. The only missing part is some tests. If you can add at least one upper case and mixed case scenario, that would be perfect.

[Frizi]

Looks perfect, thanks!

[JacobBennett]

Thanks!!