/**
 * Checks to see if a value is a certain type.
 * You may specify that type as a case-insensitive string
 * (ie, 'string', 'boolean', 'object', 'function', 'array', 'regexp', 'date', 'set, 'map'), OR a JavaScript type constructor function (ie, String, Function, Boolean, Array, RegExp, Date, Set, Map).
 * @example
 * is('boolean', true)
 * is('array', [1, 2, 3])
 * is(RegExp, /[a-z0-9]/)
 * is(Function, () => null)
 * @param {function} ofType - A JavaScript type constructor function (like `Function`, `String`, `RegExp`, `Boolean`, `Array`, `Object`, etc.) or a string value matching the name of one
 * @param {*} val - A value (of any type)
 * @returns {boolean} Whether or not the value matches the specified type
 */
export default function is(ofType: ((...params: any[]) => any) | string, val: any): boolean