Fix linting

src/App.tsx

@@ -19,13 +19,13 @@ import "./App.scss";
 
 import SingleColumn from "./layouts/SingleColumn";
 
-function App() {
+const App: React.FC = () => {
   return (
     <SingleColumn>
       <div className="topSpacer" />
       <div className="bottomSpacer" />
     </SingleColumn>
   );
-}
+};
 
 export default App;

src/layouts/SingleColumn.tsx

@@ -22,6 +22,8 @@ interface IProps {
   children?: React.ReactNode;
 }
 
-export default (props: IProps) => {
+const SingleColumn: React.FC<IProps> = (props: IProps) => {
   return <div className="singleColumnLayout">{props.children}</div>;
 };
+
+export default SingleColumn;