code: function runYarn(deps, options, exec) {
  	options = options || {};
  	exec = exec || spawnSync;
  
  	const add = options.dev ? ['add', '--dev'] : ['add'];
  	const remove = ['remove'];
  	const args = (options.remove ? remove : add).concat(deps);
  
  	return exec('yarn', args, {
  		stdio: options.stdio === undefined ? 'inherit' : options.stdio,
  		cwd: options.cwd,
  	});
  }
docs: Install given Yarn packages
  
  @param {Array|string} deps
  @param {Object} [options]
  @param {boolean} [options.dev=true] --dev (production by default)
  @param {boolean} [options.remove=false] uninstall package (install by default)
  @param {Function} [exec]
  @return {Object}