array() and tuple() only define mutable Arrays, not ReadonlyArray

I guess I have similar problem to https://github.com/ianstormtaylor/superstruct/issues/523

I wanted to define a property inside the object which is ReadonlyArray, so I did: tags: array(string())

but then when I tried to use the that object in other places of the app TS complained, since ReadonlyArray is a subset of Array (does not implement mutation methods).

Is there a way to do that using refine (since it's a generic) or is it necessary to update superstruct code?

btw. I'm sorry if the question is stupid, I'm quite new to the library - but so far I'm in love with it! Definitely the best runtime TS checker I've seen!