Bump Symfony version to 3.4.47

Author: fabpot

Kernel.php

@@ -67,12 +67,12 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     private $requestStackSize = 0;
     private $resetServices = false;
 
-    const VERSION = '3.4.46';
-    const VERSION_ID = 30446;
+    const VERSION = '3.4.47-DEV';
+    const VERSION_ID = 30447;
     const MAJOR_VERSION = 3;
     const MINOR_VERSION = 4;
-    const RELEASE_VERSION = 46;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 47;
+    const EXTRA_VERSION = 'DEV';
 
     const END_OF_MAINTENANCE = '11/2020';
     const END_OF_LIFE = '11/2021';