Create a WebSocket client instance each time before connection

[titsuki]

.connect isn't static method because it requires to lookup its attributes during the connection

[jnthn]

No, we shouldn't break existing tests. Using the type object is fine - with with Cro::HTTP::Client you only need to make an instance if you want configuration in the constructor that applies to add connections. If it is looking up attributes, it should guard that using with self { } and thus only do it if connect is called on an instance.

[titsuki]

Thanks for your reply. I'll close this PR.