Add gtag and fix icons height

layouts/default/index.js

@@ -1,11 +1,21 @@
+import React from 'react';
 import Helmet from 'components/helmet';
 import './global.scss';
+import { firePageView } from '../../lib/gtag';
 
-const DefaultLayout = (props) => (
-  <div>
-    <Helmet />
-    { props.children }
-  </div>
-);
+class DefaultLayout extends React.Component {
+  componentDidMount() {
+    firePageView(window.location.pathname);
+  }
+
+  render() {
+    return (
+      <div>
+        <Helmet />
+        { this.props.children }
+      </div>
+    );
+  }
+}
 
 export default DefaultLayout;