I have a php project reading data from .xlsx files that uses the no-longer-supported box/spout library. In order for it to work with the latest PHP version, I had to modify the box/spout code to add a bunch of #[\ReturnTypeWillChange] Attributes to suppress a bunch of deprecation warnings .

It seems like it would be better to use the current, supported library of OpenSpout instead, but I can't get it installed. Box/Spout I could install just by copying the files into my project and then requiring the Autoloader.php file in files where I used the library. Openspout no longer has this autoloader file and the documentation only talks about installing using Composer. Is there any way to install it like I did Box/Spout? I have to go through a lot of bureaucracy if I have to use composer.