[next] Update to Critters 2

Addresses issue #679 by replacing `[id]` with `[name]` for the `chunkFilename` in `MiniCssExtrac...

This fixes the issue where lazy-loaded splitted chunks fail because the SW has been updated and ...

```
<link rel=\\"preload\\" href=\\"\\/route-home\\~route-route66\\~route-route89\\.chunk\\.\\w{5...

* Adding sw importScript to promote runtimeCaching

Removing unnecessary log

ES Lint Fixes
...

babel-bug-fix

Update PRTS & `unfetch` dependencies

* fixes "is only allowed in root programmatic options" with latest jest

* pass {babelrc: fals...

* adding terser

* Update webpack-client-config.js

* adding comments false

* Update webp...

* use `isWatch` to swap `style-loader` vs Extract;

- we were assuming `!isProd` always meant ...

* fix: `--production false` === `--no-production`

* tie CSS extraction to `isWatch` bool

feat(cli): Add size-plugin

* perf fixes

* fixing vendor chunks

* fixing preloads and h2push

* removing splitChunk ...

Inline CSS with Critters Plugin

- not using `lerna` yet because of pre-release

* extract `async-loader` package

* attach `async-loader` package

* update `yarn.lock` (we ...

* fix `template/default` snapshot

* fix: remove `babelrc` files during `test.create`

Added yarn command line.

* fixing push manifest for esm

* push and preload only esm files

* adding defer

* fixin...

* Add env.ssr

* Define PRERENDER env var.

Fix SW registration

Add fast-async babel plugin by default

Url specific preloads

Add a static .prefetch() method to async! wrapper

Unneeded `-- ` characters

Build service worker for --esm

import Foo from 'async!./foo'

Foo.prefetch() // we know we'll want it.

render(<Foo />)

Esm builds