Add more types to private methods

Author: alies-dev

src/GeoIP.php

@@ -260,7 +260,7 @@ public function getClientIP()
      *
      * @return bool
      */
-    private function isValid($ip)
+    private function isValid($ip): bool
     {
         if (! filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)
             && ! filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 | FILTER_FLAG_NO_PRIV_RANGE)
@@ -279,7 +279,7 @@ private function isValid($ip)
      *
      * @return bool
      */
-    private function shouldCache(Location $location, $ip = null)
+    private function shouldCache(Location $location, $ip = null): bool
     {
         if ($location->default === true || $location->cached === true) {
             return false;