Cannot find module pretty-format or type declarations err with yarn 2

[WCByrne]

I'm using jest-styled-components in a project that uses yarn 2. It looks like jest-styled-components references pretty-format in typings/index.d.ts but pretty-format is not included as a dependency. I believe this causes issues with yarn 2.

Adding the following to yarnrc.yml resolves the issue but this should really be fixed in the package itself.

packageExtensions:
  jest-styled-components@*:
    dependencies:
      pretty-format: "*"