Prepare 9.0.0 release

Author: mfn

CHANGELOG.md

@@ -1,9 +1,11 @@
 CHANGELOG
 =========
 
-[Next release](https://github.com/rebing/graphql-laravel/compare/8.6.0...master)
+[Next release](https://github.com/rebing/graphql-laravel/compare/9.0.0...master)
 --------------
 
+2023-06-25, 9.0.0
+-----------------
 ## Breaking changes
 ### Added
 - Upgrade to graphql-php 15 [\#953 / mfn](https://github.com/rebing/graphql-laravel/pull/953)\

composer.json

@@ -73,7 +73,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "9.0-dev"
+            "dev-master": "10.0-dev"
         },
         "laravel": {
             "providers": [