Update dependency ty to v0.0.28

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ty (changelog)	==0.0.27 → ==0.0.28

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Release Notes

astral-sh/ty (ty)

v0.0.28

Compare Source

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)

Contributors

• @​zsol
• @​dcreager
• @​charliermarsh
• @​oconnor663
• @​AlexWaygood
• @​Glyphack

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