Yarn v2 required

[darktasevski]

First and foremost, thank you for your work and open-sourcing this :)

I have an issue with using this in a repository still on classic yarn. Is yarn v2 required to use this package? I believe many people out there don't like the v2 yarn and are not planning to upgrade, and setting the min version to v2 through engines is a bit of a problem.

I'm a maintainer of a bunch of (private) npm libraries and the only thing I set in package.json's engines is a min version of node.