PHP 8 Support

[sunjam]

Related to #25 php8 was introduced in v21. Note 7.x will continue to be supported for now.

[e-alfred]

Can you test the app on a server running PHP 8?

[trvrcr]

I can confirm it works on PHP 8 server

[trvrcr]

After update to 27.0.0 the scanner stopped working.
#38