* Add babel-types package
`next dev` was failing with:
```
Error: Cannot find module 'babel-types'
```
* Upgrade to the latest bs-platform
Also add the `babel-types` package to stop the `next dev` command from complaining.
* Remove extraneous babel-plugin-bucklescript dependency.
Seems the dependency has been deprecated, and it doesn't seem to be required
anyways.
* Git ignore with-reasonml/lib folder
The lib folder contains code generated by BuckleScript, it shouldn't be
versioned.
* Fix, case sensitive paths
Next.js use case-sensitive-paths-webpack-plugin and BuckleScript tries
to maintain the filename case.
* Refactor, use a .babelrc file instead of a babel config in package.json
This is the official recommended way in Next.js
* Enable way, way, waaaay nicer error messages!
Adds `"bsc-flags": ["-bs-super-errors"]` to the bsconfig.json file.
https://reasonml.github.io/community/blog/#way-way-waaaay-nicer-error-messages
* Fix npm scripts & use concurrently to run bsb & next in parallel for dev
* Upgrade bs-platform
* Replace statefulComponent with new reducerComponent
https://github.com/reasonml/reason-react/blob/master/HISTORY.md#024
* Upgrade with-reasonml example to next.js 3
