* Set a default path for wasm modules

* Added the mimetype "application/wasm" for wasm files

* Upgrade write-file-webpack-plugin to 4.4.1

* Made dynamic(import()) in test to dynamic(() => import())

fixes #5355 

As prepare is only needed to boot up the hot reloader + exportPathMap routes in development, it's not longer a requirement in the production server.

* Add analyze-bundles example

* housekeeping: with-webpack-bundle-analyzer example

* analyze-bundles example: revert the version of faker library

* analyze-bundles add analyze:server and analyze:browser to scripts

* with-webpack-bundle-analyzer example: fix typo

- Implements Lerna
- Moves all source code into `packages/next`
- Keeps integration tests in the root directory

- `<details>` and `<ul>` cannot be inside `<p>` and it will not be parsed correctly by the MDX tokenizer.
- `sh` is not a valid language name for syntax highlighting libs (e.g. [highlight.js](https://github.com/highlightjs/highlight.js/tree/master/src/languages)).

We don't need to `React.cloneElement`, twice.

This PR removes the obsolete `_containerProps` context.

### Next js 7+ and Typescript 3+ Example

No babel, tsc, pure typescript usage
Made by [next-with-typescript plugin](https://github.com/echoulen/next-with-typescript)

* Remove obsolete check in dev-server

* Don’t require package.json at runtime

Inline the Next.js version at publish time, so that there’s no runtime dependency for this

Remove `if(this.hotReloader)` as it's always guaranteed to be there.

https://github.com/zeit/next.js/pull/5317#discussion_r221233064

* Initial dev server

* Remove obsolete check

* Move hotReloader to dev-server

* Use parent renderErrorToHTML to remove dep on render.js

* Remove dev option from server itself

* show warning if there is a title in _document.js Head

* dont loop through children in production

* only 1 loop through this.props.children 💪

* also raise warning in test env

* check for null childs