Improve parse_url usage

In some edge cases, I’ve gotten a TypeError in parseUriToComponents(), when called by the function resolveUrl() (not the class method of the same name). This happens because parse_url can return false and it’s not checking for that before calling array_key_exists:

array_key_exists(): Argument #2 ($array) must be of type array, bool given

A real-world example is @pmoralesgarcia has domain-relative links like href="/blog/tag:2024/" which parse_url has trouble with, probably because of the colon. I haven’t researched the best solution, but something like the class method might be enough. It might be worth seeing what sabre-io/uri does. I’ve been using that in some other code and liking it so far.