Bump minimum PHP version to 8.4 in composer.json

Author: jrughani9

composer.json

@@ -7,7 +7,7 @@
         { "name": "Christopher Davis", "email": "chris@pmg.com" }
     ],
     "require": {
-        "php": "^8.3",
+        "php": "^8.4",
         "pmg/queue": "^6.2",
         "psr/log": "^1.0 || ^2.0 || ^3.0",
         "aws/aws-sdk-php": "^3.0"