Introduce php84 support

Author: Johannes Vogt

composer.json

@@ -10,7 +10,7 @@
   "type": "library",
   "license": "MIT",
   "require": {
-    "php": "~8.0.0||~8.1.0||~8.2.0||~8.3.0",
+    "php": "~8.0.0||~8.1.0||~8.2.0||~8.3.0||~8.4.0",
     "ext-sqlite3": "*"
   },
   "require-dev": {