Add ipv6 handling and allow non local hosts

[caesarakalaeii]

This PR allows connection to non local hosts and enables ipv6 handling.

[ImDevinC]

It's still a bit strange that validate_ip calls validate_dns, but I think this is fine as is and won't cause confusion.
What linter did you use on this? I think it would be better to do a single PR that has nothing but linter changes, instead of bundling in here, especially since there's no defined linter for this project so that's more of a personal preference

[caesarakalaeii]

I just used black in the default config, but yeah i can revert that 👍

[caesarakalaeii]

and regarding the dns call, that was just the easiest fix, if you want i can change it to if not (self.validate_ip(host) or self.validate_dns(host)): but unsure if that is any better