Change variable declaration of ‘newState’ in CodeEditor.js

Author: Pewww

src/components/CodeEditor/CodeEditor.js

@@ -270,7 +270,7 @@ class CodeEditor extends Component {
 
   _updateState(code, showJSX = true) {
     try {
-      let newState = {
+      const newState = {
         compiled: compileES5(code),
         error: null,
       };