use .phps extension for skin files

README.md

@@ -68,4 +68,4 @@ I'm willing to pay $50 to $500 in crypto (depending on severity) for every disco
 
 ## License
 
-BSD-2-Clause
+BSD-2-Clause

engine/skin.php

@@ -96,7 +96,7 @@ class SkinContext {
 
     function __construct(string $namespace) {
         $this->ns = $namespace;
-        require_once APP_ROOT.str_replace('\\', DIRECTORY_SEPARATOR, $namespace).'.skin.php';
+        require_once APP_ROOT.str_replace('\\', DIRECTORY_SEPARATOR, $namespace).'.phps';
     }
 
     function __call($name, array $arguments) {