String UUID validation via a regex

[LFabre]

String UUID validation via a regex.

• Adds a new validation method to String schemas.
• This new method allows UUID validation via a regex.
• Empty strings are not allowed since they are not a valid UUID.

The regex used to validate an UUID was taken from the project uuidv4.
/^[0-9a-f]{8}-[0-9a-f]{4}-[0-5][0-9a-f]{3}-[089ab][0-9a-f]{3}-[0-9a-f]{12}$/i

For the test cases valid UUIDs were generated using uuidv4.

[azizur]

Any update when this will be merged?

[LFabre]

I hope it can be merged soon.
Nice to see other people interested on this feature as well.

[jquense]

thanks! generally we aren't adding new regex shortcuts but i agree that this one is useful and common enough to warrant inclusion. thanks for the work!

[buzinas]

@jquense I'd be very glad if you were able to release a npm version including this, thanks!