message: eslint-plugin: dogfood lint config
diff: // Custom lint config here since source is ES5
  module.exports = {
  - plugins: ['import'],
  + plugins: ['@backstage'],
  env: {
  node: true,
  es2021: true,
  },
  rules: {
  - 'import/no-extraneous-dependencies': [
  - 'error',
  - {
  - devDependencies: false,
  - optionalDependencies: true,
  - peerDependencies: true,
  - bundledDependencies: true,
  - },
  - ],
  - // 'no-unused-expressions': 'off',
  + '@backstage/no-undeclared-imports': ['error'],
  + 'no-unused-expressions': 'off',
  },
  };
  