Enforce codestyle

app/src/index.tsx

@@ -1,15 +1,15 @@
-import * as React from "react";
-import * as ReactDOM from "react-dom";
+import * as React from 'react'
+import * as ReactDOM from 'react-dom'
 
 import App from './App'
-import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles';
+import { MuiThemeProvider, createMuiTheme } from '@material-ui/core/styles'
 
 const theme = createMuiTheme({
   palette: {
     type: 'dark', // Switching the dark mode on is a single property value change.
   },
   typography: { useNextVariants: true },
-});
+})
 
 declare var document: any
 
@@ -17,5 +17,5 @@ ReactDOM.render(
     <MuiThemeProvider theme={theme}>
       <App />
     </MuiThemeProvider>,
-    document.getElementById("example")
-);
+    document.getElementById('example'),
+)