reverse overloads with EmptyDict allowed for kwargs should be optional

[Viicos]

This definition:

@overload
def reverse(
    viewname: Literal["some-view"],
    urlconf: str | None = ...,
    *, args: Literal[None] = ...,
    kwargs: EmptyDict | None,
    current_app: Literal[None] = ...,
) -> str: ...

Will not match reverse("some-view"), although valid at runtime. This is probably also true for any typed dict where all keys aren't required.