When using a preset we need to keep in mind that the transformation
paths are relative to the preset, not the consuming package. We get
around this by using `<rootDir>` in the transform paths. However,
doing this means fixing the root directory for all of the jest tests.
This keeps the tests working in the same way but lets us fix the
preset too.
* Add initial integrate plugin package
* Add changelog
* Make plugin data parsing less strict, to support bad formatting
* Update package dependency
* Remove unused code