Use Prettier JS (#5017)

* Adds prettier

* Run lint before tests

src/LiveQuery/ParseWebSocketServer.js

@@ -4,21 +4,25 @@ const typeMap = new Map([['disconnect', 'close']]);
 const getWS = function() {
   try {
     return require('uws');
-  } catch(e) {
+  } catch (e) {
     return require('ws');
   }
-}
+};
 
 export class ParseWebSocketServer {
   server: Object;
 
-  constructor(server: any, onConnect: Function, websocketTimeout: number = 10 * 1000) {
+  constructor(
+    server: any,
+    onConnect: Function,
+    websocketTimeout: number = 10 * 1000
+  ) {
     const WebSocketServer = getWS().Server;
     const wss = new WebSocketServer({ server: server });
     wss.on('listening', () => {
       logger.info('Parse LiveQuery Server starts running');
     });
-    wss.on('connection', (ws) => {
+    wss.on('connection', ws => {
       onConnect(new ParseWebSocket(ws));
       // Send ping to client periodically
       const pingIntervalId = setInterval(() => {