- Bump the Tailwind version to v2.0
- Add necessary latest `postcss` and `autoprefixer` deps
- Clean the tw config a bit
- Add dark mode styles

Fixes https://github.com/vercel/next.js/issues/15595

- Updated the tailwindcss and tailwindcss-emotion examples to the latest version of tailwindcss
- Added a new `with-styled-jsx` example
- Updated the `basic-css` example to use CSS Modules instead of styled-jsx
- Added the examples to the documentation page for built-in css support

* Update postcss.config.js

Return empty array if the condition is not met to avoid a null/undefined PostCSS plugin.

* Update postcss.config.js

Fix array spread

* Update postcss.config.js

remove extra operator

* Fix linting
Co-authored-by: NTim Neutkens <timneutkens@me.com>

* feat(examples:tailwind): add postcss-preset-env

* fix: prettier

* Review changes

* Update README.md
Co-authored-by: NJoe Haddad <timer150@gmail.com>

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Update tailwind example

* Update blog-starter example

* Update with-next-css example

* Update with-quill-js

* Update with-rbx-bulma-pro

* Remove incompatible example

* Update with-react-multi-carousel

* Update-with-semantic-ui

* Update with-videojs example

* Remove @zeit/next-css from package.json of updated examples

* Remove deprecated examples

* Remove target from all examples

* Update package.json

* Apply suggestions from code review
Co-Authored-By: NJoe Haddad <timer@zeit.co>
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Tailwind example only run PurgeCSS in production

* Apply lint
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Update purgecss search string to include typescript files - closes #9415

* fix minor formatting issue

* Update `packages/`

* Update examples

* Update tests

* Update bench

* Update top level files

* Fix build

* trigger

* Add Purgecss

* Remove trailing comma

* Fix linting errors

* Update README.md

* Add cssnano to PostCSS plugins

* Use single quotes

Instead of bundling `postcss-cli` we can now make use of `@zeit/with-css`.

This also means we can get rid of the `<style>` import and concurrent build step for css. 🎉 

* Add Tailwind css example

* Fix read me

* Add create-next-app setup to read me