Jss: v10 release roadmap

[HenriBeck]

Just wanted to write some things down which we need to do before the release:

• [x] Add typings to the extend plugin and preset default
• [x] Enable babel loose mode #792
• [x] [[react-jss] prepare for react 17 (but maintain backward compat)](https://github.com/cssinjs/jss/issues/802)
• [x] [[react-jss] Add flowtype support](https://github.com/cssinjs/jss/issues/797)
• [x] Migrate to monorepo #714
• [x] Migrate to yarn and workspaces
• [x] [[react-jss] Drop support for react 0.13 and 0.14](https://github.com/cssinjs/jss/issues/836)
• [x] Support full syntax in fn values #682
• [x] Support Houdini Typed OM #882
• [x] Generate keyframe ids #346
• [ ] Docs #932
• [x] Update cssinjs website
• [x] Update REPL

[HenriBeck]

We can't add forwardRef support because of redux. We will need to wait until they push a fix.

Dropping support for react 0.13 and 0.14 should be relatively easy. The new context implementation could come later, we should just drop the versions on the major release.

[kof]

Updated the roadmap, we discussed with @HenriBeck today that it would be good to include #346 and #682 into that release. They are not very hard to get done and both involve breaking changes.

[kof]

We released an alpha v10

[kof]

Released v10 stable, not all goals were met, but I am closing this issue anyways, we need a new roadmap for v11.