Add input type (olefirenko#16)

I'm using Milligram (http://milligram.io/forms.html) which styles inputs depending on their type attribute.

Is there a reason the type should not be set?

Author: yannbertrand

src/VueGoogleAutocomplete.vue

@@ -1,5 +1,6 @@
 <template>
     <input
+        type="text"
         :class="classname"
         :id="id"
         :placeholder="placeholder"