Pytype

Updates:
* Add support for typing_extensions.dataclass_transform used without arguments.
* Remove --enable-cached-property entirely.

Bug fixes:
* Relax the pyi parser's duplicate identifier detection.
* Don't crash on `[]` appearing in the parameters of a user-defined class.
* Work around syntax errors in type stubs.
* Allow `_HAS_DYNAMIC_ATTRIBUTES` to work for class attribute lookups.
* Fix how pytype handles aliases to properties and overloaded methods in stubs.
* Fix how the enum overlay logs [not-supported-yet].

Updates:
* Flip the enable-cached-property flag to True. This flag is now a no-op and
will be removed in the next release.
* Add bad_unpacking error for unordered types (set and frozenset) unpacking.
* Support assigning to `importlib.import_module(...)` in pyi files.

Bug fixes:
* Raise a parser error when loading a pyi file with an invalid literal
annotation.
* Use init_class instead of instantiate in MATCH_CLASS.

Bug fixes:
* Include ParamSpecs in CollectTypeParameters.
* Fill in TypeVar substitutions when matching against protocols.
* Look up TypeVar values when retrieving an attribute from a ParameterizedClass.
* Add missing __buffer__ method to builtins.bytearray.
* output.py: don't crash upon encountering ParamSpecMatch.
* Add ForwardRef definition to typing stub.
* Implement definitions of collections.UserList, collections.UserString.
* Overload union, intersection, difference, and symmetric difference for Set
class.

Updates:
* Drop support for Python 3.7, which reached end-of-life last month.
* Support the new `BINARY_OP` opcode in python 3.11.
* Fix some stack effects for the new 3.11 opcodes.

Updates:
* Add partial typing.Self support in type stubs.
* Make some minor improvements to pytype's type stub printer.

Bug fixes:
* Flesh out definition of collections.UserDict.
* Fix timeout in file that constructs a complicated dict of tuples.
* Narrow the type of the matched variable in case branches with class matches.

Updates:
* Performance improvement: change Dict.set_str_item to merge nonatomic str
values into Dict._K.

Bug fixes:
* Fix crash caused by typing.TypeVar lookup failure.
* Do not follow aliases for "builtins" and "typing" in pyi files.
* Check [not-instantiable] for classes inheriting directly from a protocol.
* Do a better job of catching illegal TypedDict field names.
* FIX: Do not match all views for a var with multiple bindings in a CLASS_MATCH.
* Take into account __round__ implementations when analyzing round().
* Fix timeout caused by infinite loop in LookupItemRecursive.
* Fix some spurious [not-instantiable] errors.
* Only store the blockgraph when compiling the main module code.