Vijaya Bhaskar

Added functionality to emit and listen to custom events. ([#283](https://github.com/peers/peerjs-server/issues/283)) ``` Server: const peerServer = ExpressPeerServer(server, { path: "/peerjs", }); peerServer.on("ping", (socket, data) => { socket._emit('ping', 'Welcome to the WebSocket...

Added functionality to emit and listen to custom events. ([#283](https://github.com/peers/peerjs-server/issues/283)) ``` Server: const peerServer = ExpressPeerServer(server, { path: "/peerjs", }); peerServer.on("ping", (socket, data) => { socket._emit('ping', 'Welcome to the WebSocket...