ci: php 8.4

Author: didoda

.github/workflows/php.yml

@@ -16,12 +16,12 @@ jobs:
   cs:
     uses: bedita/github-workflows/.github/workflows/php-cs.yml@v2
     with:
-      php_versions: '["8.3"]'
+      php_versions: '["8.4"]'
 
   stan:
     uses: bedita/github-workflows/.github/workflows/php-stan.yml@v2
     with:
-      php_versions: '["8.3"]'
+      php_versions: '["8.4"]'
 
   unit:
     name: 'Run unit tests'
@@ -30,7 +30,7 @@ jobs:
 
     strategy:
       matrix:
-        php-version: [8.3]
+        php-version: [8.3, 8.4]
 
     steps:
       - name: 'Checkout current revision'