Upgraded dependencies

[sm2017]

Upgraded dependencies
See Kurento/bugtracker#386 for more details

I hope we have no issue with "websocket-stream": "~5.5.0" , I know that we have issue with "websocket-stream": "~0.5.1"

https://github.com/KurentoForks/reconnect-ws/blob/master/index.js#L12
I dont find _buffer in "websocket-stream": "~5.5.0" is it important?

[JoseGoncalves]

@sm2017 I think you can drop ws in devDependencies as this is pulled by websocket-stream.
The only direct dependencies for this package are websocket-stream and reconnect-core.

[sm2017]

@JoseGoncalves done

[JoseGoncalves]

Tried to use v5.5.0 of websocket-stream in my app using Kurento 6.11 and had some issues with it.
Reverted to v3.3.3 which works perfectly in my use case.

[JoseGoncalves]

_buffer is part of the BufferPool class that was removed in ws v2.

So, to be able to upgrade websocket-stream to something higher than v3.3.3 (the last version that depends on ws v1) the code in index.js from the reconnect-ws package must be adapted.