Compatible with php 8.3

[Alex300]

Fix Deprecated: Implicit conversion from float to int loses precision
Fix dinamic creation object property is deprecated

[peterdd]

return type definitions are PHP 7+, securimage is PHP5.4+

(assuming there are still PHP5.6 installs at least)

https://wiki.php.net/rfc/return_types

[Alex300]

I removed return type definitions. I didn't even know that someone could use PHP 5.x

[perdedora]

The phpdoc for getCode is wrong. If $returnExisting is set to false, it will return an object somehow, not an array.

---

return type definitions are PHP 7+, securimage is PHP5.4+

Where did you got this information about PHP5.4+?
The README clearly states PHP7.0+ which already supports return types.