use object-assign ponyfill

examples/vue-router/app.js

@@ -1,3 +1,4 @@
+import assign from 'object-assign'
 import Vue from 'vue'
 import VueMeta from 'vue-meta'
 import Router from 'vue-router'
@@ -51,6 +52,6 @@ const App = {
   `
 }
 
-const app = new Vue(Object.assign(App, { router }))
+const app = new Vue(assign(App, { router }))
 
 app.$mount('#app')

examples/vuex/app.js

@@ -1,8 +1,9 @@
+import assign from 'object-assign'
 import Vue from 'vue'
 import store from './store'
 import router from './router'
 import App from './App.vue'
 
-const app = new Vue(Object.assign(App, { router, store }))
+const app = new Vue(assign(App, { router, store }))
 
 app.$mount('#app')

package.json

@@ -5,7 +5,8 @@
   "author": "Declan de Wet <declandewet@me.com>",
   "bugs": "https://github.com/declandewet/vue-meta/issues",
   "dependencies": {
-    "deepmerge": "^1.2.0"
+    "deepmerge": "^1.2.0",
+    "object-assign": "^4.1.0"
   },
   "devDependencies": {
     "babel-cli": "^6.18.0",

src/shared/mergeComponentData.js

@@ -1,3 +1,5 @@
+import assign from 'object-assign'
+
 /**
  * Recursively shallow-merges component object with it's children component objects.
  * This function is responsible for obtaining the `this` context of metaInfo props when
@@ -9,7 +11,7 @@
 export default function mergeComponentData (component) {
   if (component.$children.length) {
     return component.$children.reduce((data, child) => {
-      return Object.assign({}, data, mergeComponentData(child))
+      return assign({}, data, mergeComponentData(child))
     }, component)
   }
   return component

yarn.lock

@@ -3567,7 +3567,7 @@ oauth-sign@~0.8.1:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
-object-assign@^4.0.0, object-assign@^4.0.1, object-assign@^4.1.0:
+object-assign, object-assign@^4.0.0, object-assign@^4.0.1, object-assign@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"