Integration with prettier

My project (based on [developmentseed/cookiecutter-browserify-react-mapboxgl](https://github.com/developmentseed/cookiecutter-browserify-react-mapboxgl)) is using devseed-standard for linting and prettier for formatting. When I change the formatting preferences in .prettierrc, devseed-standard does not adhere to the same rules, but throws linting errors.

I wonder if we should integrate prettier directly into devseed-standard, shifting all formatting responsibility to prettier and use eslint for linting only. This is the recommended approach in the documentation as well, see https://prettier.io/docs/en/integrating-with-linters.html.

@sethvincent Would you agree to this approach?