Update method definition

client/About.js

@@ -2,8 +2,11 @@ import React from 'react'
 import contentHTML from './About.md'
 
 class About extends React.Component {
-  render = () =>
-    <div className="wrapper" dangerouslySetInnerHTML={{ __html: contentHTML }}/>
+  render() {
+    return (
+      <div className="wrapper" dangerouslySetInnerHTML={{ __html: contentHTML }}/>
+    )
+  }
 }
 
 export default About