message: tests(chalk): Force chalk to on in matcher tests for consistency
  ## Summary
  Follow up to Forces `chalk` to be turned on in matcher tests for
  consistent snapshot output. Should fix tests on TravisCI.
  ## Test plan
  Existing tests should pass. TravisCI should pass.
diff: const {stringify} = require('jest-matcher-utils');
  const jestExpect = require('../');
  const Immutable = require('immutable');
  +const chalk = require('chalk');
  +const chalkEnabled = chalk.enabled;
  +
  +beforeAll(() => {
  + chalk.enabled = true;
  +});
  +
  +afterAll(() => {
  + chalk.enabled = chalkEnabled;
  +});
  it('should throw if passed two arguments', () => {
  expect(() => jestExpect('foo', 'bar')).toThrow(
  