Replaced composer.json with updated content

Author: Thomas Berends

setup/upgrade_major.rst

@@ -124,24 +124,41 @@ done!
 -----------------------------------------------
 
 Once your code is deprecation free, you can update the Symfony library via
-Composer by modifying your ``composer.json`` file:
+Composer by modifying your ``composer.json`` file. In this file update all
+mentions of ``4.4.*`` to ``5.0.*``.
 
 .. code-block:: json
 
     {
         "...": "...",
 
         "require": {
-            "symfony/symfony": "^4.1",
+        "symfony/asset": "5.0.*",
+        "symfony/flex": "^1.3.1",
+        "symfony/mailer": "5.0.*",
+        "symfony/yaml": "5.0.*"
         },
         "...": "..."
     }
 
+At the bottom of your ``composer.json`` file, in the ``extra`` block you can
+find a data setting for the symfony version. Make sure to also upgrade
+this one. For instance, update it to ``5.0.*`` to upgrade to Symfony 5.0:
+
+.. code-block:: json
+
+    "extra": {
+        "symfony": {
+            "allow-contrib": false,
+            "require": "5.0.*"
+        }
+    }
+
 Next, use Composer to download new versions of the libraries:
 
 .. code-block:: terminal
 
-    $ composer update symfony/symfony
+    $ composer update symfony/*
 
 .. include:: /setup/_update_dep_errors.rst.inc