Unbound type parameter error for type alias of type alias of interface

[davidfurey]

Example with error:

interface Z<T> {
    field: T;
}

type Y<T> = Z<T>

type X = Y<string>

is<X>({ field: 'some-string' })

[woutervh-]

Thank you @davidfurey !
Released https://github.com/woutervh-/typescript-is/releases/tag/v0.18.1