fix vue2 issue, bump to v0.2.1

Author: icebob

dist/vue-websocket.js

@@ -1,6 +1,6 @@
 {
   "name": "vue-websocket",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Websocket handler for Vue.js",
   "homepage": "https://github.com/icebob/vue-websocket",
   "main": "dist/vue-websocket.js",

dist/vue-websocket.js.map

@@ -14,7 +14,7 @@ export default {
 		Vue.prototype.$socket = socket;
 
 		let addListeners = function() {
-			if (this.$options.hasOwnProperty("socket")) {
+			if (this.$options["socket"]) {
 				let conf = this.$options.socket;
 				if (conf.namespace) {					
 					this.$socket = IO(conf.namespace, conf.options);
@@ -32,7 +32,7 @@ export default {
 		};
 
 		let removeListeners = function() {
-			if (this.$options.hasOwnProperty("socket")) {
+			if (this.$options["socket"]) {
 				let conf = this.$options.socket;
 
 				if (conf.namespace) {