cli: use new eslint plugin + fix issues

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

scripts/verify-api-reference.js

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-/* eslint-disable import/no-extraneous-dependencies */
+/* eslint-disable @backstage/no-undeclared-imports */
 
 const { resolve: resolvePath } = require('path');
 const { promises: fs } = require('fs');