Merge branch '9.x'

# Conflicts:
#	CHANGELOG.md
#	composer.json
#	src/Illuminate/Foundation/Application.php
#	src/Illuminate/Routing/Redirector.php

Pipeline.php

@@ -13,7 +13,7 @@ class Pipeline implements PipelineContract
     /**
      * The container implementation.
      *
-     * @var \Illuminate\Contracts\Container\Container
+     * @var \Illuminate\Contracts\Container\Container|null
      */
     protected $container;