Steps: 1. Have code like this: ``` import type { E164Number } from 'libphonenumber-js' const foo: E164Number = "some random text" ``` Expected: When running a typecheck with `tsc --noEmit` typescript should output an error since "some random text" is not an E164Number. Actual: Typescript is very happy with that type. The problem is that the `__tag` on the type is optional: https://gitlab.com/catamphetamine/libphonenumber-js/-/merge_requests/8#note_837866181 But it should be required: https://github.com/piotrwitek/utility-types/blob/2491e464b9adfa88ff9f799e4fd151aa25b71249/src/mapped-types.ts#L549