Fix some minor code inspection issues

Author: iMattPro

composer.json

@@ -20,7 +20,8 @@
 	],
 	"require": {
 		"php": ">=5.6",
-		"composer/installers": "~1.0"
+		"composer/installers": "~1.0",
+		"ext-zip": "*"
 	},
 	"require-dev": {
 		"phing/phing": "~2.4"

helper/packager.php

@@ -16,6 +16,7 @@
 use phpbb\config\config;
 use phpbb\di\service_collection;
 use phpbb\filesystem\filesystem;
+use phpbb\path_helper;
 use phpbb\skeleton\ext;
 use phpbb\skeleton\template\twig\extension\skeleton_version_compare;
 use phpbb\template\context;
@@ -198,10 +199,13 @@ protected function get_template_engine()
 			'assets_version'  => null,
 		]);
 
+		/** @var path_helper $path_helper */
 		$path_helper = $this->phpbb_container->get('path_helper');
+		/** @var filesystem $filesystem */
+		$filesystem = $this->phpbb_container->get('filesystem');
 		$environment = new environment(
 			$config,
-			$this->phpbb_container->get('filesystem'),
+			$filesystem,
 			$path_helper,
 			$this->phpbb_container->getParameter('core.cache_dir'),
 			$this->phpbb_container->get('ext.manager'),