Merge pull request #108 from blink1073/fix-ci

Fix linting error

Author: blink1073

{{cookiecutter.github_project_name}}/src/plugin.ts

@@ -16,12 +16,12 @@ const EXTENSION_ID = '{{ cookiecutter.npm_package_name }}:plugin';
 /**
  * The example plugin.
  */
-const examplePlugin: IPlugin<Application<Widget>, void> = ({
+const examplePlugin: IPlugin<Application<Widget>, void> = {
   id: EXTENSION_ID,
   requires: [IJupyterWidgetRegistry],
   activate: activateWidgetExtension,
   autoStart: true,
-} as unknown) as IPlugin<Application<Widget>, void>;
+} as unknown as IPlugin<Application<Widget>, void>;
 // the "as unknown as ..." typecast above is solely to support JupyterLab 1
 // and 2 in the same codebase and should be removed when we migrate to Lumino.