/**
 * Immutably replaces an item at the specified index of the array
 *
 * @since v0.0.1
 * @category Array
 * @template {T} - The type of the array
 * @param {T[]} array - The array of items
 * @param {number} index - The index of the item to replace; use a negative index to count from the end
 * @param {T} item - The replacement item
 * @returns {T[]}
 * @example
 * const array = [7, 25, 21];
 *
 * replaceAt(array, 1, 97)  //=> [7, 97, 21]
 */
export declare const replaceAt: <T = unknown>(array: T[], index: number, item: T) => T[];