Updated eslint package and fixed lint errors.

Author: orrisroot

.eslintrc

@@ -1,11 +1,10 @@
 {
   "extends": "eslint:recommended",
   "parserOptions": {
-    "ecmaVersion": 6,
+    "ecmaVersion": 2018,
     "sourceType": "module",
     "ecmaFeatures": {
-      "jsx": true,
-      "experimentalObjectRestSpread": true
+      "jsx": true
     }
   },
   "env": {

demo/src/js/components/Editor.js

@@ -49,28 +49,28 @@ export default class Editor extends Component {
     if (view === 'html') {
       const { html } = this.props;
       return <AceEditor mode="html"
-                        theme="chrome"
-                        name="HTML_EDITOR"
-                        value={ html }
-                        width="100%"
-                        height="auto"
-                        onChange={ value => this.onEditorChange(value) }
-                        onLoad={ editor => this.onEditorLoad(editor) }
-                        editorProps={ editorProps }
+        theme="chrome"
+        name="HTML_EDITOR"
+        value={ html }
+        width="100%"
+        height="auto"
+        onChange={ value => this.onEditorChange(value) }
+        onLoad={ editor => this.onEditorLoad(editor) }
+        editorProps={ editorProps }
       />;
     }
     else {
       const { selectedExample } = this.props;
       const value = data[selectedExample].display ? data[selectedExample].display : `const options = ${JSON.stringify(data[selectedExample].options, null, 2)}`;
       return <AceEditor mode="javascript"
-                        theme="chrome"
-                        name="HTML_EDITOR"
-                        value={ value }
-                        width="100%"
-                        height="auto"
-                        readOnly={ true }
-                        onLoad={ editor => this.onEditorLoad(editor) }
-                        editorProps={ editorProps }
+        theme="chrome"
+        name="HTML_EDITOR"
+        value={ value }
+        width="100%"
+        height="auto"
+        readOnly={ true }
+        onLoad={ editor => this.onEditorLoad(editor) }
+        editorProps={ editorProps }
       />;
     }