Bump psr/container from 1.0.0 to 1.1.1

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

lib/private/AppFramework/Utility/SimpleContainer.php

@@ -52,11 +52,11 @@ public function __construct() {
 		$this->container = new Container();
 	}
 
-	public function get($id) {
+	public function get(string $id) {
 		return $this->query($id);
 	}
 
-	public function has($id): bool {
+	public function has(string $id): bool {
 		// If a service is no registered but is an existing class, we can probably load it
 		return isset($this->container[$id]) || class_exists($id);
 	}