Fix linting (#403)

public/index.html

@@ -58,12 +58,12 @@
       src="https://www.googletagmanager.com/gtag/js?id=UA-387204-13"
     ></script>
     <script>
-      window.dataLayer = window.dataLayer || []
+      window.dataLayer = window.dataLayer || [];
       function gtag() {
-        dataLayer.push(arguments)
+        dataLayer.push(arguments);
       }
-      gtag("js", new Date())
-      gtag("config", "UA-387204-13")
+      gtag("js", new Date());
+      gtag("config", "UA-387204-13");
     </script>
   </head>