- Uses [`vnopts`](https://github.com/ikatyang/vnopts#readme) - This way it should be easier to support language-specific options (https://github.com/prettier/prettier/pull/4798#issuecomment-407258477) and map the common options to language-specific options using [`forward`](https://github.com/ikatyang/vnopts#forward), e.g. `singleQuote: true` -> `"javascript/singleQuote": "js"`, `singleQuote: false` -> `"javascript/singleQuote": "none"`.