Add client socket ID to LiveQuery 'ws_disconnect' event

[krtooch]

Add client ID on ParseLiveQuery 'ws_disconnect' event

• [ x] I am not disclosing a vulnerability.
• [ x] I am not just asking a question.
• [ x] I have searched through existing issues.

Current Limitation

In order to create a Online/offline functionality with ParseLiveQuery socket protocol, i'd like to add client's socket Id to 'ws_disconnect' event, in order to know which socket is disconnecting.

[parse-github-assistant]

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