Use local version for isInteger rather than Number.isInteger (browser compatability)

[jeff-phillips-18]

No description provided.

[rodneyrehm]

I'd like to avoid changing anything outside of the URI.js space, as another library could react differently because Number.isInteger() is present where it otherwise wouldn't be.

How about we (ab)use some RegExp /^[0-9]+$/.test(v) or (ab)use the modulo port % 1 === 0 on line 1068 instead? either approach should have the same effect, i.e. return false for anything but positive integers.

[jeff-phillips-18]

Added local isInteger function, added unit tests for ensureValidPort function.

[rodneyrehm]

thank you!
released as v1.18.12