client should not override #send

[jtuttle]

The client defines a #send method that overrides the default Object#send method of a plain Ruby Object. This can cause problems when trying to use SimpleDelegator to wrap the client class, as the Object#send method is called on the SimpleDelegator wrapper object instead of it being delegated to the client object.

[unasuke]

@jtuttle This repository was moved ruby-jp/websocket-client-simple. If you still need this, make pull request or issue to ruby-jp/websocket-client-simple again, thx.