Enhancement: Exposed WindowError from builtins.pyi file.
Enhancement: Added overload definitions for built-in "open" function so it distinguishes between Io[str] and Io[bytes] if the provided mode argument is a string literal.
Bug Fix: Added support for metaclasses when using magic function lookups. This allows classes, for example, to be used in binary operation expressions.
Bug Fix: Fixed recent regression in "Organize Imports" feature that caused incorrect ordering of imports.
Bug Fix: Fixed issue that caused sporadic type checker errors to be reported when editing or opening certain files within a workspace.