refactor: set render method as override

Author: fernandopasik

docs/get-element-name.md

@@ -34,7 +34,7 @@ const Example = (): ReactElement => <div>this is the inner content</div>;
 getElementName(<Example />); // Result: 'Example'
 
 class Example2 extends Component {
-  public render(): JSX.Element {
+  public override render(): JSX.Element {
     return <div />;
   }
 }

src/lib/getElementName.test.tsx

@@ -25,7 +25,7 @@ describe('getElementName', () => {
   it('of a class component', () => {
     class Example extends React.Component {
       // eslint-disable-next-line @typescript-eslint/class-methods-use-this
-      public render(): JSX.Element {
+      public override render(): JSX.Element {
         return <div />;
       }
     }

src/lib/groupByType.test.tsx

@@ -90,7 +90,7 @@ describe('groupByType', () => {
     let elements: Record<string, ReactNode[]> = {};
 
     class Example extends React.Component<{ children: ReactNode }> {
-      public render(): ReactElement {
+      public override render(): ReactElement {
         const { children } = this.props;
         return <div>{children}</div>;
       }