add extensions to lint & lint:fix (#1490)

Signed-off-by: Sebastian Malton <sebastian@malton.name>

extensions/example-extension/page.tsx

@@ -11,7 +11,7 @@ export class ExamplePage extends React.Component<{ extension: LensRendererExtens
   deactivate = () => {
     const { extension } = this.props;
     extension.disable();
-  }
+  };
 
   render() {
     const doodleStyle = {

extensions/example-extension/renderer.tsx

@@ -12,7 +12,7 @@ export default class ExampleExtension extends LensRendererExtension {
         Page: () => <ExamplePage extension={this}/>,
       }
     }
-  ]
+  ];
 
   clusterPageMenus = [
     {
@@ -22,5 +22,5 @@ export default class ExampleExtension extends LensRendererExtension {
         Icon: ExampleIcon,
       }
     }
-  ]
+  ];
 }