Fix "Missing version in workspace" warning

[JohnAlbin]

I'm currently seeing the following when running many yarn commands:

warning Missing version in workspace at "/Users/johnalbin/Sites/projects/next-drupal/modules/next", ignoring

Unfortunately, this warning is output ALL THE TIME. For example:

• When running yarn install
• When trying to use shell autocomplet yarn workspace n[tab]

The autocomplete warning is particularly frustrating since the warning erases the command prompt I'm trying to autocomplete.

[JohnAlbin]

This warning might go away without needing any fixes when we implement https://github.com/chapter-three/next-drupal/issues/534