Feature request - wait for: either url

A nice to have would be the ability to OR URLs.

One implementation could be:
`wait-on (tcp:[::1]:80 tcp:127.0.0.1:80)`

Alternatively, it could be pure config.

If I've misread the docs and this already exists, then my apologies.

Issue I'm solving:
Since updating to Node17+. Node DNS lookups return IPv6 first. Which might not seem like a massive issue, but `localhost` URLs are now in theory `[::1]:{port}` rather than `127.0.0.1:{port}`

My current project is using wait on like so - `wait-on localhost:5000 localhost:5001` and will hang as the servers are starting on `[::1]:5000` ... etc..

Start by reading the wait-on command-line and Node.js API handling for resource lists, then check the documented configuration options. Define how an OR group such as `(tcp:[::1]:80 tcp:127.0.0.1:80)` should parse and behave alongside existing resources, and verify that localhost waits complete when either address becomes available.

Written by the indexing model from the issue text.