If you're reading about this commit from an autogenerated changelog entry, this should have no user-visible impact on how the stubs are interpreted by a type checker; it's just an internal change to how typeshed's tests work.
Add a dependency on `types-pyasn1`, removing the need to subclass `Any`. Fill in many missing types. Use `Incomplete` rather than `Any` where applicable.
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
