Here's a .prettierrc config file to revert the new 2.0.0 config changes:

    {
      "trailingComma": "none",
      "arrowParens": "avoid"
    }

Know that you'll still have non-trivial diffs when switching from 1.x to 2.0 due to other changes (like "the `function` keyword should always have a space after it because consistency").

I just updated the PhotoStructure codebase, and even with that revert of those 2 defaults, almost 100 files and several thousand lines of diff resulted: https://twitter.com/mrm/status/1241792817338257409