🐛 Bug Report

Attempting to use Docusaurus v2 with Yarn v2 (berry).
As soon as i run yarn build the build explodes with dependency errors from yarn v2.

Lots of peer dependencies aren't specified and yarn v2 doesn't know what to do.

Example error

Error: @docusaurus/core tried to access @docusaurus/plugin-content-blog, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

Interesting that this doesn't happen in yarn v1, but it seems to be due to no dependencies/peer dependencies being specified for the various docusaurus packages.

Steps to reproduce

• Install/have yarn v2 as the package manager for project
• Install docusaurus v2
• run yarn build.

I've tried to install every dependency yarn says it can't find, but it's an endless process, and i still haven't managed to get a build to work.

Basically, right now, docusaurus v2 is not compatible with yarn v2 😢