doc(README): fix wrong UMD import refer #9

Author: Walker Leite

README.md

@@ -69,6 +69,6 @@ $ npm run build:umd
 <script src="./dist/my-cmp.min.js" charset="utf-8"></script>
 
 <script type="text/javascript">
-  Vue.component('my-cmp', window.MyCmp);
+  Vue.component('my-cmp', window.MyCmp.default);
 </script>
 ```

template/README.md

@@ -41,7 +41,7 @@ Vue.component('{{ name }}', {{ camelcase name }});
 <link rel="stylesheet" type="text/css" href="./dist/umd/{{ name }}.min.css">
 
 <script type="text/javascript">
-  Vue.component('{{ name }}', window.{{ camelcase name }});
+  Vue.component('{{ name }}', window.{{ camelcase name }}.default);
 </script>
 ```