Changes

• classes with WebSockets now receive an Arc<PubsubClient> to better share the underlying resource
• drift-rs has its own modified PubsubClient with reconnection handling
• the client will manage the underlying Ws. Consumer can decide what their connection guarantees/config will be e.g. failfast, exponential backoff. resubscription on disconnects will happen transparently.

TODO:

• resubscription api/management is clunky (make it event driven?) rn subscribers eagerly attempt to resubscribe after a disconnect

closes #80