New Feature: Type checking support for @DataClass, which was introduced in Python 3.7.
New Feature: Type checker now reports incorrect usage of ellipses in various cases.
Fixed #67: Modules are now treated as though they derive from object by the type checker.
Improved responsiveness of VS Code extension.
Improved error reporting for abstract class instantiation; abstract methods are now reported with their containing class.
Fixed #68: Silenced incorrect error for star expression usage (list expansion).
Fixed some edge cases relating to new and init validation.
Fixed #66: Bug caused an infinite loop in type checker.
Fixed automatic detection of python import paths for Python 3.x environments (contribution from @zhangkaizhao)