title: vue2-google-maps mark-icon size and use of the google object to resize don't work
body: <p>I'm using <a href="https://www.npmjs.com/package/vue2-google-maps" rel="nofollow noreferrer">vue2-google-maps</a> and i'm trying change  marker-icon size and use the google object to resize, but  don't work when i refresh the page.</p>
  
  <p>Here is the problem:</p>
  
  <p><a href="https://i.stack.imgur.com/o849F.png" rel="nofollow noreferrer">First attempt after save</a> Working fine!</p>
  
  <p><a href="https://i.stack.imgur.com/vQN2E.png" rel="nofollow noreferrer">After I refresh the page</a> Doesn't work</p>
  
  <p>I try to emulate the exemple of use google object from the website of vue2-google-maps.</p>
  
  <p>The HTML/Vue</p>
  
  <pre><code>&lt;template&gt;
   &lt;v-content  class="background-light"&gt;
     &lt;v-layout row wrap&gt;
      &lt;v-flex xs12 class="mb-4"&gt;
       &lt;GmapMap
        :center="{lat: 19.636226, lng: 42.806212}"
        :zoom="5"
        map-type-id="terrain"
        style="width: 500px; height: 300px"
      &gt;
        &lt;GmapMarker
          :key="index"
          v-for="(m, index) in markers"
          :position="m.position"
          :clickable="true"
          :draggable="true"
          @click="center=m.position"
          :icon="m.icon"
          :label="m.label"
        /&gt;
        &lt;/GmapMap&gt;
      &lt;/v-flex&gt;
     &lt;/v-layout&gt;
    &lt;/v-container&gt;
   &lt;/v-content&gt;
  &lt;/template&gt;
  </code></pre>
  
  <p>This the script</p>
  
  <pre><code>&lt;script&gt;
  import {gmapApi} from 'vue2-google-maps'
  export default {
   data: () =&gt; ({
    markers: [],
   }),
   created () {
    this.initialize()
   },
   computed: {
    google: gmapApi
   },
   methods: {
    initialize () {
     this.markers = [
       {
        position:
          {
            lat: 19.636226,
            lng: 42.806212
          },
        icon: {
          url: 'https://image.flaticon.com/teams/slug/google.jpg',
          scaledSize:  this.google &amp;&amp; new google.maps.Size(28, 28),
          labelOrigin: this.google &amp;&amp; new google.maps.Point(16,-10),
          },
        title: 'title',
        label: {
          text: 'label',
          color: "black",
          fontWeight: "bold",
          fontSize: "12px"
        }
      }, 
      {
        position:
        {
          lat: 18.445320,
          lng: 47.989452
        },
        icon: {
          url: 'https://image.flaticon.com/teams/slug/google.jpg',
          scaledSize: this.google &amp;&amp; new google.maps.Size(28, 28),
          labelOrigin: this.google &amp;&amp; new google.maps.Point(16,-10),
          },
        title: 'title',
        label: {
          text: 'label',
          color: "black",
          fontWeight: "bold",
          fontSize: "12px"
        }
      },
      {
        position:
        {
          lat: 19.128580,
          lng: 47.698405
        },
         icon: {
          url: 'https://image.flaticon.com/teams/slug/google.jpg',
          scaledSize: this.google &amp;&amp; new google.maps.Size(28, 28),
          labelOrigin: this.google &amp;&amp; new google.maps.Point(16,-10),
          },
        title: 'title',
        label: {
          text: 'label',
          color: "black",
          fontWeight: "bold",
          fontSize: "12px"
        }
      },
      {
        position:
          {
            lat: 19.881369,
            lng: 43.367863
          },
        icon: {
          url: 'https://image.flaticon.com/teams/slug/google.jpg',
          scaledSize: this.google &amp;&amp; new google.maps.Size(28, 28),
          labelOrigin: this.google &amp;&amp; new google.maps.Point(16,-10),
          },
        title: 'title',
        label: {
          text: 'label',
          color: "black",
          fontWeight: "bold",
          fontSize: "12px"
        }
       }, 
      ]
     },
    },
   }
  &lt;/script&gt;
  </code></pre>