0.16.3

• It's now possible to get the request object for websocket handlers by adding a third argument to the invoker function. (self, websocket, request) or by specifying request as a keyword argument in the function signature. Using the request object it's now possible to parse browser headers and other data sent when first opening the websocket connction.
• Updated packages for automated tests to verify that newer dependencies still works correctly.
• Updated the dependency of aioamqp to allow aioamqp==0.13.x.