Pytype

New features and updates:
* Support typing.final and typing.Final.
* Rework directors.py's source parsing using LibCST.
* Show error name in red in Linux-like environments.

Bug fixes:
* Add fixes for instantiating a typed dict from an annotation.
* Prevent misfiring of "NoReturn is not allowed as inner type" error.
* Defer checking of `Final` so that it can be used with `Annotated`.
* Output typed dicts into the pyi file.

New features and updates:
* Make available an initial implementation of recursive type aliases with a
feature flag, --allow-recursive-types. Once this feature is stable, the flag
will be removed and its behavior made the default.
* Allow using '...' as a top-level type annotation. This is an experimental
annotation that means "inferred type".

Bug fixes:
* Stop replacing unsubstituted type params in generic aliases with Any in stubs.
* Better handle type aliases with multiple options.

New features and updates:
* Drop support for Python 3.6.
* Make classmethod and staticmethod generic.

Bug fixes:
* Fix a load_pytd bug involving circular dependencies and star imports.

New features and updates:
* Add a feature flag, --enable-typed-dicts, for basic TypedDict support. Once
this feature is stable, the flag will be removed and its behavior made the
default.
* Delete --fix-module-collisions flag. It has been a no-op since the last
release.
* Add support for attr.dataclass.
* Add a 'recursive' attribute to pytd.LateType.
* This is the last release that supports Python 3.6. Starting from the next
release, pytype will only support Python 3.7+.

Bug fixes:
* Don't report an unhelpful name error when YIELD_FROM yields nothing.
* Downgrade 'no MAKE_FUNCTION opcode found for decorator' to a warning.
* Improve an [invalid-annotation] error message.
* Fix a bug in parameterizing a generic type alias with a TypeVar.
* Fix ParamSpec bugs that are blocking typeshed.

New features and updates:
* Enable --fix-module-collisions by default and make the flag a no-op. It will
be removed in the next release.

Bug fixes:
* Fix a bug in resolving dotted name types in load_pytd.
* Fix a Python 3.9 issue with ` pytype: disable=attribute-error` line numbers.
* Eliminate some spurious 'TypeVar not in scope' errors.
* Stop reporting weird name errors for ".0".

New features and updates:
* Update typeshed pin to commit 3b6a52b from Nov 29.

Bug fixes:
* Recognize typing_extensions.SupportsIndex as a protocol.
* Allow summing anything with an __add__ method.
* Remove pytd optimizations that broke overloads.
* Fix a crash in --protocols mode.
* Add object.__dir__ to builtins.pytd.