Update src/shuffle.ts

Co-authored-by: William <[email protected]>

src/shuffle.ts

@@ -63,7 +63,7 @@ function randomRange(min: number, max: number): number {
  * @param {Array} array - Any type of array
  * @return {Array} - The sorted array
  */
-export function shuffle(array) {
+export function shuffle(array: any[]) {
     if (array.length === 1) {
         return array;
     }