Fixed wrong docs for Plugin->getPluginFilters()

src/pocketmine/plugin/ScriptPluginLoader.php

@@ -118,7 +118,7 @@ class ScriptPluginLoader implements PluginLoader{
 	/**
 	 * Returns the filename patterns that this loader accepts
 	 *
-	 * @return array
+	 * @return string
 	 */
 	public function getPluginFilters(){
 		return "/\\.php$/i";