chore(deps-dev): Bump the development-dependencies group with 5 updates

[dependabot]

Bumps the development-dependencies group with 5 updates:

Package	From	To
mypy	1.19.1	1.20.0
ty	0.0.26	0.0.29
types-python-dateutil	2.9.0.20260323	2.9.0.20260402
types-requests	2.33.0.20260327	2.33.0.20260402
types-simplejson	3.20.0.20250822	3.20.0.20260402

Updates mypy from 1.19.1 to 1.20.0

Changelog

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Mypy 1.20

We’ve just uploaded mypy 1.20.0 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.

Planned Changes to Defaults and Flags in Mypy 2.0

As a reminder, we are planning to enable --local-partial-types by default in mypy 2.0, which will likely be the next feature release. This will often require at least minor code changes. This option is implicitly enabled by mypy daemon, so this makes the behavior of daemon and non-daemon modes consistent.

Note that this release improves the compatibility of --local-partial-types significantly to make the switch easier (see below for more).

This can also be configured in a mypy configuration file (use False to disable):

local_partial_types = True

For more information, refer to the documentation.

We will also enable --strict-bytes by default in mypy 2.0. This usually requires at most minor code changes to adopt. For more information, refer to the documentation.

Finally, --allow-redefinition-new will be renamed to --allow-redefinition. If you want to continue using the older --allow-redefinition semantics which are less flexible (e.g. limited support for conditional redefinitions), you can switch to --allow-redefinition-old, which is currently supported as an alias to the legacy --allow-redefinition behavior. To use --allow-redefinition in the upcoming mypy 2.0, you can't use --no-local-partial-types. For more information, refer to the documentation.

Better Type Narrowing

Mypy's implementation of narrowing has been substantially reworked. Mypy will now narrow more aggressively, more consistently, and more correctly. In particular, you are likely to notice new narrowing behavior in equality expressions (==), containment expressions (in),

... (truncated)

Commits

• 770d3ca Remove +dev from version
• 4738ffa Changelog updates for 1.20 (#21109)
• b4f07a7 Use 'native-parser' instead of 'native-parse' for optional dependency (#21115)
• 7bec7b7 [mypyc] Document librt and librt.base64 (#21114)
• c482596 --allow-redefinition-new is no longer experimental (#21110)
• c916ca3 sdist: include misc/{diff-cache,apply-cache-diff}.py for `mypy/test/test_di...
• b137e4e [mypyc] Speed up native-to-native imports within the same group (#21101)
• 978b711 [mypyc] Fix range loop variable off-by-one after loop exit (#21098)
• 67ada30 [stubtest] Check runtime availability of private types not marked `@type_chec...
• bdef6ef librt cache tests: build respecting MYPY_TEST_PREFIX (#21097)
• Additional commits viewable in compare view

Updates ty from 0.0.26 to 0.0.29

Release notes

Sourced from ty's releases.

0.0.29

Release Notes

Released on 2026-04-05.

Bug fixes

• Avoid special-casing for dataclasses.field if it's not in field_specifiers (#24397)
• Reject unsupported environment.python-version values in configuration files (#24402)
• Respect supported lower bounds from requires-python (#24401)

Core type checking

• Add support for types.new_class (#23144)
• Fix PEP 695 type aliases in with statement (#24395)
• Respect __new__ and metaclass __call__ return types (#24357)
• Treat enum attributes with type annotations as members (#23776)

Contributors

• @​charliermarsh
• @​carljm

Install ty 0.0.29

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.29/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.29/ty-installer.ps1 | iex"

Download ty 0.0.29

File	Platform	Checksum
ty-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
ty-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
ty-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
ty-i686-pc-windows-msvc.zip	x86 Windows	checksum
ty-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
ty-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
ty-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
ty-powerpc64-unknown-linux-gnu.tar.gz	PPC64 Linux	checksum
ty-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE Linux	checksum

... (truncated)

Changelog

Sourced from ty's changelog.

0.0.29

Released on 2026-04-05.

Bug fixes

• Avoid special-casing for dataclasses.field if it's not in field_specifiers (#24397)
• Reject unsupported environment.python-version values in configuration files (#24402)
• Respect supported lower bounds from requires-python (#24401)

Core type checking

• Add support for types.new_class (#23144)
• Fix PEP 695 type aliases in with statement (#24395)
• Respect __new__ and metaclass __call__ return types (#24357)
• Treat enum attributes with type annotations as members (#23776)

Contributors

• @​charliermarsh
• @​carljm

0.0.28

Released on 2026-04-02.

Bug fixes

• Mark loop header assignments as used to avoid false positives in "unused variable" diagnostics (#24336)

LSP server

• Show constructor signature of classes when hovering over them (#24257)

Core type checking

• Avoid emitting cascading diagnostics when parsing invalid type expressions (#24326)
• Handle most "deep" mutual TypeVar constraints (#24079)
• Improve consistency and quality of diagnostics relating to invalid type forms (#24325)
• Improve robustness of various type-qualifier-related checks (#24251)
• Infer the extra_items keyword argument to class-based TypedDicts as an annotation expression (#24362)
• Use bidirectional inference to fix false positives on operations such as x: list[int | None] = [None] * 2 (#24197)
• Sync vendored typeshed stubs (#24340). Typeshed diff
• Tighten up validation of subscripts and attributes in type expressions (#24329)
• Use infer_type_expression for parsing parameter annotations and return-type annotations (#24353)
• Use infer_type_expression for validating PEP-613 type aliases (#24370)
• Validate TypedDict fields when subclassing (#24338)
• Validate type qualifiers in functional TypedDict fields and the extra_items keyword to functional TypedDicts (#24360)
• Improve diagnostics for invalid functional TypedDicts (#24345)

... (truncated)

Commits

• 438a78d Bump version to 0.0.29 (#3218)
• 927aad2 Bump version to 0.0.28 (#3206)
• 29d288e Publish installers to /installers/ty/latest on the mirror (#3202)
• 5c9e342 Bump version to 0.0.27 (#3185)
• e6a5731 Update actions/cache action to v5.0.4 (#3172)
• c47b982 Update prek dependencies (#3173)
• 657abcf Update astral-sh/setup-uv action to v8 (#3174)
• 9e582cb Fetch the cargo-dist binary directly instead of using the installer (#3160)
• d5c51ea docs: use content tabs (#3146)
• 9893776 Use the release environment in publish-docs (#3147)
• See full diff in compare view

Updates types-python-dateutil from 2.9.0.20260323 to 2.9.0.20260402

Commits

• See full diff in compare view

Updates types-requests from 2.33.0.20260327 to 2.33.0.20260402

Commits

• See full diff in compare view

Updates types-simplejson from 3.20.0.20250822 to 3.20.0.20260402

Commits

• See full diff in compare view

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