Update pyo3 requirement from 0.20.0 to 0.28.1

[dependabot]

Updates the requirements on pyo3 to permit the latest version.

Release notes

Sourced from pyo3's releases.

PyO3 0.28.1

This patch contains a number of minor compile-time fixes for PyO3 0.28.0.

Thank you to the following contributors for the improvements:

@​davidhewitt @​funsafemath @​ngoldbaum @​rara64 @​tdyas

Changelog

Sourced from pyo3's changelog.

[0.28.1] - 2026-02-14

Fixed

• Fix *args / **kwargs support in experimental-async feature (regressed in 0.28.0). #5771
• Fix clippy::declare_interior_mutable_const warning inside #[pyclass] generated code on enums. #5772
• Fix ambiguous_associated_items compilation error when deriving FromPyObject or using #[pyclass(from_py_object)] macro on enums with Error variant. #5784
• Fix __qualname__ for complex #[pyclass] enum variants to include the enum name. #5796

[0.28.0] - 2026-02-01

Packaging

• Bump MSRV to Rust 1.83. #5531
• Bump minimum supported quote version to 1.0.37. #5531
• Bump supported GraalPy version to 25.0. #5542
• Drop memoffset dependency. #5545
• Support for free-threaded Python is now opt-out rather than opt-in. #5564
• Bump target-lexicon dependency to 0.13.3. #5571
• Drop indoc and unindent dependencies. #5608

Added

• Add __init__ support in #[pymethods]. #4951
• Expose PySuper on PyPy, GraalPy and ABI3 #4951
• Add PyString::from_fmt and py_format! macro. #5199
• Add #[pyclass(new = "from_fields")] option. #5421
• Add pyo3::buffer::PyUntypedBuffer, a type-erased form of PyBuffer<T>. #5458
• Add PyBytes::new_with_writer #5517
• Add PyClass::NAME. #5579
• Add pyo3_build_config::add_libpython_rpath_link_args. #5624
• Add PyBackedStr::clone_ref and PyBackedBytes::clone_ref methods. #5654
• Add PyCapsule::new_with_pointer and PyCapsule::new_with_pointer_and_destructor for creating capsules with raw pointers. #5689
• Add #[deleter] attribute to implement property deleters in #[methods]. #5699
• Add IntoPyObject and FromPyObject implementations for uuid::NonNilUuid. #5707
• Add PyBackedStr::as_str and PyBackedStr::as_py_str methods. #5723
• Add support for subclassing native types (PyDict, exceptions, ...) when building for abi3 on Python 3.12+. #5733
• Add support for subclassing PyList when building for Python 3.12+. #5734
• FFI definitions:
  • Add FFI definitions PyEval_GetFrameBuiltins, PyEval_GetFrameGlobals and PyEval_GetFrameLocals on Python 3.13 and up. #5590
  • Add FFI definitions PyObject_New, PyObject_NewVar, PyObject_GC_Resize, PyObject_GC_New, and PyObject_GC_NewVar. #5591
  • Added FFI definitions and an unsafe Rust API wrapping Py_BEGIN_CRITICAL_SECTION_MUTEX and Py_BEGIN_CRITICAL_SECTION_MUTEX2. #5642
  • Add FFI definition PyDict_GetItemStringRef on Python 3.13 and up. #5659
  • Add FFI definition PyIter_NextItem on Python 3.14 and up, and compat::PyIter_NextItem for older versions. #5661
  • Add FFI definitions PyThreadState_GetInterpreter and PyThreadState_GetID on Python 3.9+, PyThreadState_EnterTracing and PyThreadState_LeaveTracing on Python 3.11+, PyThreadState_GetUnchecked on Python 3.13+, and compat::PyThreadState_GetUnchecked. #5711
  • Add FFI definitions PyImport_ImportModuleAttr and PyImport_ImportModuleAttrString on Python 3.14+. #5737
  • Add FFI definitions for the PyABIInfo and PyModExport APIs available in Python 3.15. #5746
• experimental-inspect:
  • Emit base classes. #5331
  • Emit @typing.final on final classes. #5552

... (truncated)

Commits

• 45f49ff release: 0.28.1
• 56c34d6 Document Py_GIL_DISABLED in pyo3-build-config docs (#5810)
• 92bc9ef Avoid unused variable warning with a debug Python build (#5811)
• ca5df1a ci: re-enable list_get_item_unchecked benchmark on free-threaded build (#5812)
• 413d9b5 Fix missing std::sync::atomic::Ordering import for targets without atomic64...
• 1c764cd docs: improve messaging around #[pyclass(from_py_object)] change (#5798)
• 927411a fix __qualname__ for complex enum variants (#5796)
• 2334344 Fix ambiguous associated item error (#5784)
• 3f5dba9 two before sections, one is after (#5775)
• 2b15366 use inline const expression initializing enum singletons (#5772)
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