old_contents: module.exports = {
    plugins: ['jest'],
    env: {
      'jest/globals': true,
    },
    rules: {
      'jest/consistent-test-it': ['error', {fn: 'test', withinDescribe: 'it'}],
      'jest/lowercase-name': 'error',
      'jest/no-disabled-tests': 'warn',
      'jest/no-focused-tests': 'error',
      'jest/no-hooks': ['error', {allow: ['afterEach']}],
      'jest/no-identical-title': 'error',
      'jest/no-large-snapshots': 'off',
      'jest/no-test-prefixes': 'error',
      'jest/prefer-expect-assertions': 'off',
      'jest/prefer-to-be-null': 'error',
      'jest/prefer-to-be-undefined': 'error',
      'jest/prefer-to-have-length': 'error',
      'jest/valid-describe': 'error',
      'jest/valid-expect-in-promise': 'error',
      'jest/valid-expect': 'error',
    },
  };
  
new_contents: module.exports = {
    plugins: ['jest'],
    env: {
      'jest/globals': true,
    },
    rules: {
      'jest/consistent-test-it': ['error', {fn: 'test', withinDescribe: 'it'}],
      'jest/lowercase-name': 'error',
      'jest/no-disabled-tests': 'warn',
      'jest/no-focused-tests': 'error',
      'jest/no-hooks': ['error', {allow: ['afterEach']}],
      'jest/no-identical-title': 'error',
      'jest/no-jest-import': 'error',
      'jest/no-large-snapshots': 'off',
      'jest/no-test-prefixes': 'error',
      'jest/prefer-expect-assertions': 'off',
      'jest/prefer-to-be-null': 'error',
      'jest/prefer-to-be-undefined': 'error',
      'jest/prefer-to-have-length': 'error',
      'jest/valid-describe': 'error',
      'jest/valid-expect-in-promise': 'error',
      'jest/valid-expect': 'error',
    },
  };
  
subject: add new `eslint-plugin-jest` rules