Test against PHP 8.4 (#201)

Author: W0rma

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [8.1, 8.2, 8.3]
+        php: [8.1, 8.2, 8.3, 8.4]
         symfony: ["5.4.*", "6.4.*", "7.1.*"]
         exclude:
           - php: 8.1