refactor: use prettier to format code

.eslintrc.json

@@ -1,10 +1,4 @@
 {
-  "extends": "standard",
-  "parser": "babel-eslint",
-  "rules": {
-    "yoda": 0,
-    "semi": [2, "always"],
-    "no-extra-semi": 2,
-    "semi-spacing": [2, { "before": false, "after": true }]
-  }
+  "extends": "prettier",
+  "parser": "babel-eslint"
 }

lib/engine.io.js

@@ -2,8 +2,8 @@
  * Module dependencies.
  */
 
-const http = require('http');
-const Server = require('./server');
+const http = require("http");
+const Server = require("./server");
 
 /**
  * Invoking the library as a function delegates to attach if the first argument
@@ -18,7 +18,7 @@ const Server = require('./server');
  * @api public
  */
 
-exports = module.exports = function () {
+exports = module.exports = function() {
   // backwards compatible use as `.attach`
   // if first argument is an http server
   if (arguments.length && arguments[0] instanceof http.Server) {
@@ -51,31 +51,31 @@ exports.Server = Server;
  * @api public
  */
 
-exports.Socket = require('./socket');
+exports.Socket = require("./socket");
 
 /**
  * Expose Transport constructor.
  *
  * @api public
  */
 
-exports.Transport = require('./transport');
+exports.Transport = require("./transport");
 
 /**
  * Expose mutable list of available transports.
  *
  * @api public
  */
 
-exports.transports = require('./transports');
+exports.transports = require("./transports");
 
 /**
  * Exports parser.
  *
  * @api public
  */
 
-exports.parser = require('engine.io-parser');
+exports.parser = require("engine.io-parser");
 
 /**
  * Creates an http.Server exclusively used for WS upgrades.
@@ -89,15 +89,15 @@ exports.parser = require('engine.io-parser');
 
 exports.listen = listen;
 
-function listen (port, options, fn) {
-  if ('function' === typeof options) {
+function listen(port, options, fn) {
+  if ("function" === typeof options) {
     fn = options;
     options = {};
   }
 
-  const server = http.createServer(function (req, res) {
+  const server = http.createServer(function(req, res) {
     res.writeHead(501);
-    res.end('Not Implemented');
+    res.end("Not Implemented");
   });
 
   // create engine server
@@ -120,7 +120,7 @@ function listen (port, options, fn) {
 
 exports.attach = attach;
 
-function attach (server, options) {
+function attach(server, options) {
   const engine = new Server(options);
   engine.attach(server, options);
   return engine;