title: How to set custom icon height for Tab bar icon while using React Native Navigation?
body: <p>Is there a way to set custom icon height and width for tab bar buttons?</p>
  
  <p>Thanks!</p>
  
  <pre><code>search() {
  return {
    name: 'search',
    screen: 'entry.Entry',
    title: "Entry",
    titleImage: true,
    navigatorButtons: {
      leftButtons: [{
        id: 'back-button',
        component: 'entry.BackButton'
      }]
    },
    icon: require("./navigationAssets/searchIconInactive.png"),
    selectedIcon: require(./navigationAssets/searchIconActive.png")
  };
  </code></pre>
  
  <p>}</p>