Upgrade to PHP-DI 6

Author: mnapoli

composer.json

@@ -17,11 +17,12 @@
     },
     "require": {
         "php": "^7.0",
-        "php-di/php-di": "^5.4",
-        "doctrine/cache": "^1.6",
+        "php-di/php-di": "^6.0",
         "mindplay/composer-locator": "^2.1.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7"
-    }
+    },
+    "minimum-stability": "alpha",
+    "prefer-stable": true
 }

src/Kernel.php

@@ -2,11 +2,8 @@
 
 namespace DI\Kernel;
 
-use ComposerLocator;
-use DI\Cache\ArrayCache;
 use DI\Container;
 use DI\ContainerBuilder;
-use Doctrine\Common\Cache\Cache;
 
 /**
  * Application kernel.
@@ -66,11 +63,6 @@ public function createContainer() : Container
     {
         $containerBuilder = new ContainerBuilder();
 
-        $cache = $this->getContainerCache();
-        if ($cache) {
-            $containerBuilder->setDefinitionCache($cache);
-        }
-
         foreach ($this->modules as $module) {
             $this->loadModule($containerBuilder, $module);
         }
@@ -84,16 +76,6 @@ public function createContainer() : Container
         return $containerBuilder->build();
     }
 
-    /**
-     * Override this method to configure the cache to use for container definitions.
-     *
-     * @return Cache|null
-     */
-    protected function getContainerCache()
-    {
-        return new ArrayCache();
-    }
-
     /**
      * Override this method to customize the container builder before it is used.
      */