chore: update workflows to include PHP 8.4

Author: michalsn

.github/workflows/phpstan.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-versions: ['8.2', '8.3']
+        php-versions: ['8.2', '8.4']
 
     steps:
       - name: Checkout

.github/workflows/phpunit.yml

@@ -25,7 +25,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     strategy:
       matrix:
-        php-versions: ['8.2', '8.3']
+        php-versions: ['8.2', '8.3', '8.4']
         db-platforms: ['MySQLi']
 
     services:

.github/workflows/rector.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-versions: ['8.2', '8.3']
+        php-versions: ['8.2', '8.4']
 
     steps:
       - name: Checkout