/**
 * Splits `string` into an array of its words.
 *
 * words('fred, barney, & pebbles') // => ['fred', 'barney', 'pebbles']
 * words('fred, barney, & pebbles', /[^, ]+/g) // => ['fred', 'barney', '&', 'pebbles']
 */
export declare function words(input: string, pattern?: RegExp | string): string[];