socketId added, on_connection_state_change , when pusher connected.

[usmanokara]

✨ What kind of change does this PR introduce? (Bug fix, feature, docs update...)

Feature

⤵️ What is the current behavior?

User can listen to connection status (previous and new)

🆕 What is the new behavior (if this is a feature change)?

Now user can access socket Id when connected to Pusher. This socket id is required for private and presence channel subscription.

💥 Does this PR introduce a breaking change?

Yeah. before this user cannot subscribe to PresenceChannel. because Authentication is required. But Authentication needs socket Id. So now socket Id is available.

🐛 Recommendations for testing

User can print socket Idwhen pusher status is connected and can verify from Pusher console log.

📝 Links to relevant issues/docs

#7
#6

🤔 Checklist before submitting

• All projects build
• Follows style guide lines (code style guide)
• Relevant documentation was updated
• Rebased onto current develop

[usmanokara]

hi @josh-burton please review my pr