Upgrade php version to stable version (currently 8.4)

Current version of PHP(8.1) is reaching end of life by the end of the year, currently it is locked in the composer.json to use the version 8.1.x:

```
"require": {
        "php": "8.1.*",
```

It would be great if that version is bumped ideally to the current stable version which is 8.4 by the time I am writing this