* chore(deps): update dependency prettier to v2

* Run prettier-fix

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Jamie Magee <jamie.magee@gmail.com>

Also convert usage of chai to jest

Closes #1661, Closes #1884, Closes #1909

This PR adds new checks that:
- Website configuration options are listed in alphabetical order
- Every relevant configuration option in source code is documented on the website
Website docs have been updated accordingly to pass.

Closes #543, Closes #1310