Update mypy requirement from ^0.991 to ^1.4

[dependabot]

Updates the requirements on mypy to permit the latest version.

Changelog

Sourced from mypy's changelog.

Mypy Release Notes

Next release

Stubgen will now include __all__ in its output if it is in the input file (PR 16356).

Mypy 1.7

We’ve just uploaded mypy 1.7 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release on Read the Docs.

Using TypedDict for **kwargs Typing

Mypy now has support for using Unpack[...] with a TypedDict type to annotate **kwargs arguments enabled by default. Example:

# Or 'from typing_extensions import ...'
from typing import TypedDict, Unpack
class Person(TypedDict):
name: str
age: int
def foo(**kwargs: Unpack[Person]) -> None:
...
foo(name="x", age=1)  # Ok
foo(name=1)  # Error

The definition of foo above is equivalent to the one below, with keyword-only arguments name and age:

def foo(*, name: str, age: int) -> None:
    ...

Refer to PEP 692 for more information. Note that unlike in the current version of the PEP, mypy always treats signatures with Unpack[SomeTypedDict] as equivalent to their expanded forms with explicit keyword arguments, and there aren't special type checking rules for TypedDict arguments.

This was contributed by Ivan Levkivskyi back in 2022 (PR 13471).

TypeVarTuple Support Enabled (Experimental)

Mypy now has support for variadic generics (TypeVarTuple) enabled by default, as an experimental feature. Refer to PEP 646 for the details.

TypeVarTuple was implemented by Jared Hance and Ivan Levkivskyi over several mypy releases, with help from Jukka Lehtosalo.

... (truncated)

Commits

• 3534bac Remove +dev from version
• f36ea01 Fix async iterator body stripping (#15491)
• ba7887b Revert "Fix spurious errors on builtins.open (#15161)" (#15508)
• 16fe5da Fix readthedocs build (#15437)
• 9b327d1 Use consistent anchors for error codes (#15435)
• 32abe02 docs: ref redirector (#15432)
• e5a5b33 Unbreak CI (#15505)
• 81d01aa Fix PEP 561 editable install test case (#15493)
• eba351e Add pip as test requirement for PEP 660 editable installs (#15482)
• 9faffe8 Bump typing_extensions dependency (#15488)
• Additional commits viewable in compare view

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