message: Improve coverage of plugin.test.ts
diff: * limitations under the License.
  */
  -import { gitHubReleaseManagerPlugin } from './plugin';
  +import * as plugin from './plugin';
  describe('github-release-manager', () => {
  - it('should export plugin', () => {
  - expect(gitHubReleaseManagerPlugin).toBeDefined();
  + it('should export plugin & friends', () => {
  + expect(Object.keys(plugin)).toMatchInlineSnapshot(`
  + Array [
  + "githubReleaseManagerApiRef",
  + "gitHubReleaseManagerPlugin",
  + "GitHubReleaseManagerPage",
  + ]
  + `);
  });
  });
  