Bumps msgpack from 1.1.2 to 1.2.1.

Sourced from msgpack's releases.

v1.2.1

What's Changed

• Bump pypa/cibuildwheel from 4.0.0 to 4.1.0 in the all-dependencies group by @​dependabot[bot] in msgpack/msgpack-python#694
• release v1.2.1 by @​methane in msgpack/msgpack-python#698

Full Changelog: msgpack/msgpack-python@v1.2.0...v1.2.1

v1.2.0

What's Changed

• relax setuptools version by @​methane in msgpack/msgpack-python#652
• update setuptools requirements to >=78.1.1 by @​methane in msgpack/msgpack-python#653
• cython: freethreading_compatible by @​methane in msgpack/msgpack-python#654
• drop Python 3.9 by @​methane in msgpack/msgpack-python#656
• update cython and cibuildwheel by @​methane in msgpack/msgpack-python#658
• ci: add riscv64 manylinux/musllinux wheels by @​justeph in msgpack/msgpack-python#664
• fix: check unpack_callback_uint32 result by @​KowalskiThomas in msgpack/msgpack-python#666
• fix: re-raise existing exception when available by @​KowalskiThomas in msgpack/msgpack-python#667
• fix: check return code in unpack_callback_int64 by @​KowalskiThomas in msgpack/msgpack-python#665
• Fixed README example by @​vallsv in msgpack/msgpack-python#668
• Bump the all-dependencies group with 6 updates by @​dependabot[bot] in msgpack/msgpack-python#669
• ci: use ubuntu-slim for lint by @​methane in msgpack/msgpack-python#670
• fix: enforce strict_map_key with object_pairs_hook by @​KowalskiThomas in msgpack/msgpack-python#673
• Raise DEFAULT_RECURSE_LIMIT from 511 to 1024 by @​Copilot in msgpack/msgpack-python#676
• fix: properly handle return codes in pack_timestamp by @​KowalskiThomas in msgpack/msgpack-python#672
• fix: avoid memory leak when decoding invalid nested arrays by @​KowalskiThomas in msgpack/msgpack-python#671
• Add missing autoreset in Packer.pack_ext_type by @​bysiber in msgpack/msgpack-python#663
• Add no-GIL interpreter support by @​clin1234 in msgpack/msgpack-python#641
• skip recursion limit test on free-threaded CPython builds by @​methane in msgpack/msgpack-python#679
• Fix Timestamp.from_datetime returning wrong value for pre-epoch datetimes by @​bysiber in msgpack/msgpack-python#662
• Add 3.15 to CI by @​clin1234 in msgpack/msgpack-python#678
• fix: use-after-free in get_data_from_buffer by @​KowalskiThomas in msgpack/msgpack-python#677
• change changelog format to markdown by @​methane in msgpack/msgpack-python#680
• Bump the all-dependencies group with 2 updates by @​dependabot[bot] in msgpack/msgpack-python#684
• Bump sys.setrecursionlimit within test_nest_limit_1024 by @​clin1234 in msgpack/msgpack-python#682
• Guard Packer buffer protocol hooks with Cython critical sections by @​Copilot in msgpack/msgpack-python#686
• Harden Unpacker.__init__ re-entry cleanup to prevent buffer/context leaks by @​Copilot in msgpack/msgpack-python#687
• release v1.2.0rc1 by @​methane in msgpack/msgpack-python#681
• Wheels CI hangs for MacOS Intel by @​crusaderky in msgpack/msgpack-python#689
• Bump pypa/cibuildwheel from 3.4.1 to 4.0.0 in the all-dependencies group by @​dependabot[bot] in msgpack/msgpack-python#691
• release v1.2.0 by @​methane in msgpack/msgpack-python#692

New Contributors

• @​justeph made their first contribution in msgpack/msgpack-python#664
• @​KowalskiThomas made their first contribution in msgpack/msgpack-python#666
• @​vallsv made their first contribution in msgpack/msgpack-python#668
• @​dependabot[bot] made their first contribution in msgpack/msgpack-python#669
• @​Copilot made their first contribution in msgpack/msgpack-python#676
• @​bysiber made their first contribution in msgpack/msgpack-python#663
• @​clin1234 made their first contribution in msgpack/msgpack-python#641

... (truncated)

Sourced from msgpack's changelog.

1.2.1

Release Date: 2026-06-19

Fix a segfault when calling Unpacker.unpack() or Unpacker.skip() after an unpacking failure. But note that reusing the same Unpacker instance after an unpacking failure is not supported. Please create a new Unpacker instance instead. GHSA-6v7p-g79w-8964

1.2.0

Release Date: 2026-06-11

• Support free threaded Python. #654, #686
• Dropped support for Python 3.9. #656
• Fix missing error checks in C code. #665, #666, #667, #672
• Fix strict_map_key option didn't work for object_pairs_hook. #673
• Increase DEFAULT_RECURSE_LIMIT of Unpacker to 1024. #676
• Fix memory leak when Unpacker returns error for invalid input. #671
• Fix Packer.pack_ext_type() ignored autoreset option. #663
• Fix Timestamp.from_datetime() returning wrong value for pre-epoch datetimes. #662
• Fix use-after-free in unpackb() and Unpacker.unpack() for non-contiguous input. #677
• Fix possible memory leak when calling Unpacker.__init__() several times. #687

• 448d43f release v1.2.1 (#698)
• 2c56ddb Merge commit from fork
• 0f4f350 Bump pypa/cibuildwheel from 4.0.0 to 4.1.0 in the all-dependencies group (#694)
• 11ed0a5 release v1.2.0 (#692)
• c410a38 Bump pypa/cibuildwheel from 3.4.1 to 4.0.0 (#691)
• 97ba6ca skip ci: remove unneeded CIBW_SKIP option
• cdde1b0 Wheels CI hangs for MacOS Intel (#689)
• 5eb57e1 release v1.2.0rc1 (#681)
• 77395c1 Harden Unpacker.__init__ re-entry cleanup to prevent buffer/context leaks (...
• 7df7136 Guard Packer buffer protocol hooks with Cython critical sections (#686)
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