Few code standards. Remove composer vendor folder

solutions/other/reversemultiple9.php

@@ -1,6 +1,6 @@
 <?php
 //Find a three-digit number such that when the digits are reversed and subtracted from the original number, the result is a multiple of 9.
-function numreverse($number) {
+function numreverse(int $number): int {
 
     $numberStr = (string)$number;
     $numberStr = strrev($numberStr);