Consider switching back to independent versioning

[anicholls]

💡 Suggestion

Now that we're using slash imports, we should consider going back to independent versioning in v5. A few things to consider though:

• How the fonts modules work with their respective target modules
• How canvas-kit-labs-react interops with canvas-kit-react

Ideally we'd just use independent versioning for CSS so we don't keep bumping it while it's in maintenance mode, but that's not possible with Lerna unfortunately.