Hi guys, just migrate my site from dev to a stage environment, i already installed your plugin in 20 other sites without having a single problem, but also i havent' touched composer updates since a while...
With the last multisite, i cloned your repo, composer installed deps, activated the plugin and got the error:

The S3 Uploads plugin requires PHP version 5.5.0 or higher. Your server is running PHP version 7.0.33-11+ubuntu18.04.1+deb.sury.org+1.

As the message... it seems a plugin bug... could you check?
Thanks!