Hi there,
Typescript 3.4 introduced a shorthand for readonly tuples (e.g. readonly string[]), see here.

Prettier itself seems to support it since version 1.17.

Is there a chance, that we can get a release with updated prettier (or is there a workaround to use a newer prettier version with the vs code extension)?

Up to now, prettier extension refuses to format the whole document, if I use one of these types.

Cheers,
ford