fix isUrl pipeline char

[ghost]

The regular expression used to validate the urls, doesn't match a regular uri like this:
https://www.google.it/search?q=to+be+||+not+to+be

The problem is that the actual regex, doesn't match the "pipeline char" of the parameter's values.

[Semigradsky]

It makes sense to change the validator to Diego Perini variant:
https://mathiasbynens.be/demo/url-regex

[aesopwolf]

I'm in favor of moving to the @dperini regex. We can hardcode, but I'd also be okay with pulling in https://github.com/kevva/url-regex. Mainly since it seems that there are occasional updates to the regex itself. So it's nice to have a repo that keeps up to date with the original gist and runs unit tests.