Missing check whether IP version is right on resolve

[kelunik]

Calling resolve with an IP address currently simply resolves to chat address. But it doesn't check whether it's allowed by the current "types" in $options:

var_dump(yield Amp\Dns\resolve('8.8.8.8', ['types' => Amp\Dns\Record::AAAA])); works just fine, but should result in an exception, because no records found. Or for the A → AAAA case, we can rewrite it to an IPv6 address.

[kelunik]

This will be resolved in the Amp v2 version.