Test in PHP 8.4

Author: donatj

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ ubuntu-latest ]
-        php-versions: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3' ]
+        php-versions: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
         psr-http-versions: [ '~1.0.0', '^1', '^2' ]
         exclude:
           - php-versions: '7.3'
@@ -21,6 +21,10 @@ jobs:
 
     runs-on: ${{ matrix.operating-system }}
 
+    env:
+      # Temporary until PHP CS Fixer is updated to support PHP 8.4
+      PHP_CS_FIXER_IGNORE_ENV: 1
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4