Hmmm, this a dependency issue (introduces a breaking change in a patch release), I believe you all running on PHP 7.3? I'm not sure if I want to downgrade the dependency to a version which it supports 7.3 (haven't PHP dropped support for 7.3 yet?).
Or this really could be a bug on the dependecy, regardless of the PHP version, I'm not sure tbh. But the owner of the repository (@jfcherng) says that it won't support 7.3 in one of their release notes.
