Enhancement: Added checks to ensure that type annotations contain only class types, not instantiated objects.
Enhancement: Added code to filter out duplicate "pseudo-generic" types in unions when printing them. We omit the type arguments when printing pseudo-generic types, so without this filtering, we were seeing seemingly-duplicated types.
Enhancement: Added support for literal type aliases used within Literal type arguments.
Bug Fix: Fixed bug in handling of unpack operator when used as an assignment target. It should be typed as List, not as Iterable.
Bug Fix: Fixed recent regression that affected the logic that combines Literal[True] and Literal[False] into bool.
Enhancement: Added support for several "type" metadata fields that are accessible on classes that derive from type. This includes __subclasses__, __module__, etc.
Enhancement: Added more trace logging to output pane.
Bug Fix: Fixed bug in hover text. Sometimes hovering over a module import target didn't display the module-level doc string.
Enhancement: Added severity level enum to package.json so it is editable within the VS Code settings UI.