[netcurl] netcurl 6.1.1 has been released

As of today, the netcurl branch version 6.1 is ready for PHP 8 For the older branch 6.0, since it's barely maintained tests shows that most of the library still works when switching up to 8.0, but there are no longer guarantees for this to work. If not done yet, make sure you upgrade from 6.0 so you won't get stuck with incompatible releases.