style: use object shorthand for properties (webtorrent#400)

Author: LinusU

lib/client/http-tracker.js

@@ -125,7 +125,7 @@ class HTTPTracker extends Tracker {
 
     let request = get.concat({
       url: parsedUrl.toString(),
-      agent: agent,
+      agent,
       timeout: common.REQUEST_TIMEOUT,
       headers: {
         'user-agent': this.client._userAgent || ''

lib/client/udp-tracker.js

@@ -258,7 +258,7 @@ class UDPTracker extends Tracker {
 
     function send (message, proxyInfo) {
       if (proxyInfo) {
-        const pack = Socks.createUDPFrame({ host: hostname, port: port }, message)
+        const pack = Socks.createUDPFrame({ host: hostname, port }, message)
         socket.send(pack, 0, pack.length, proxyInfo.port, proxyInfo.host)
       } else {
         socket.send(message, 0, message.length, port, hostname)

lib/client/websocket-tracker.js

@@ -186,7 +186,7 @@ class WebSocketTracker extends Tracker {
           agent = new Socks.Agent(clone(this.client._proxyOpts.socksProxy), (parsedUrl.protocol === 'wss:'))
         }
       }
-      this.socket = socketPool[this.announceUrl] = new Socket({ url: this.announceUrl, agent: agent })
+      this.socket = socketPool[this.announceUrl] = new Socket({ url: this.announceUrl, agent })
       this.socket.consumers = 1
       this.socket.once('connect', this._onSocketConnectBound)
     }

test/client.js

@@ -582,7 +582,7 @@ function testClientStartHttpAgent (t, serverType) {
       infoHash: fixtures.leaves.parsedTorrent.infoHash,
       announce: announceUrl,
       peerId: peerId1,
-      port: port,
+      port,
       wrtc: {},
       proxyOpts: {
         httpAgent: agent