Requires PHP >= 7.4

[UltimateBrent]

Probably worth noting in the readme. Without 7.4 you can't have typed class properties.

[miqwit]

Hum ok. Composer file states "php": "^7.2|^8.0", so I presume this is not correct. I don't think I tested it with PHP 7.2.
In that case I'll release another version to prevent users from using < 7.4.