Change disconnect() to close() in documentation (#226)

It was wrong.

Author: erikdubbelboer

docs/api-reference.md

@@ -67,8 +67,8 @@ Sends data to a specific peer.
 ##### `broadcast(channel: string, data: any): void`
 Sends data to all connected peers.
 
-##### `disconnect(): void`
-Disconnects from the current lobby and cleans up resources.
+##### `close(): void`
+Disconnects everything and cleans up resources.
 
 ### Events
 

docs/basic-usage.md

@@ -165,7 +165,7 @@ network.on('ready', state => {
 3. **Clean Up**
 ```js
 // When your game stops
-network.disconnect()
+network.close()
 ```
 
 4. **Latency Optimization**