PHP 8 compatibility

Created by: sebalis

Hi,

as you will know, PHP 7.4 will reach its “end of life” in late November. A rough test on a sandbox instance indicates that this extension should be compatible, were it not for a single line in the boiler plate code generated by an earlier version of civix, which uses curly braces to access an array element. I will submit a pull request for that line now. Could you merge it? Even if there are more issues I overlooked, this will at least make it easier to find them. So could you merge this pull request and maybe publish a new version? Thanks.