/**
* Checks if `value` is `undefined`.
*
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
* @example
*
* isUndefined(void 0)
* // => true
*
* isUndefined(null)
* // => false
*/
export const isUndefined = value => value === undefined