Please consider adding PyPy Trove classifiers, because apparently black works fine! At least on the recent PyPy (I tested PyPy3.6 v7.0 on macOS). I used version 18.9b0 of black. See https://pypy.org/download.html

To reproduce, go to the rustfmt configuration documentation site (https://rust-lang.github.io/rustfmt/) and change the version to v0.8.1 or v0.7, and observe the Failed to get configuration options for this version, please select the version from the dropdown above. message and empty option list.

![image](https://user-images.githubusercontent.com/13042488/93717131-5ec68e80-fb39-11ea-8e98-84de

When I try to beautify the i get the following problem
TypeError: Cannot read property 'on' of undefined

I just installed beautify and uncrustify

https://gist.github.com/ODCA117/917affd6b11437517535a45350379820

I really don't know if we have some rules to create Mercosul/Brazilian license plate, but I think that we should keep support for both (after 2024 we can drop Brazilian support since Brazil will only use Mercosul format).