New styled component API

[kof]

We want to migrate styled-jss to the latest react-version (hooks based) and at the same time make the API more familiar to everyone by implementing some of the emotions API.

Todo

• [x] Initial effort #1094
• [ ] merge, dedupe labels
• [ ] Fix failing tests on safari https://travis-ci.org/cssinjs/jss/builds/544679314#L1834
• [ ] optimize perf
• [ ] docs

Next

• [ ] "Hook" prefix in class name is pointless
• [ ] Don't render additional static rule, when rule is a function
• [ ] publish benchmark
• [ ] Warnings in dev mode for unsupported rules annoying when unsupported css is used by choice to target browsers which support it?
• [ ] Babel plugin to pass the component name to the class name
• [ ] add docs and links for the styled system #974
• [ ] jest serializer #804
• [x] css function #747
• [x] css prop #1092

[caub]

I'd love styled-jss to be updated! looking forward to do the same as https://github.com/cssinjs/examples/blob/gh-pages/react-ssr/src/server.js#L3 with styled-jss (I plan to use it with preact btw, also because styled-components is broken with preact, with hooks api)