build(deps): update pygit2 requirement from >=1 to >=1.19.2

[dependabot]

Updates the requirements on pygit2 to permit the latest version.

Release notes

Sourced from pygit2's releases.

1.19.2 (2026-03-29)

• Fix refcount and error handling issues in filter_register(...)

• Fix config with valueless keys #1457

• New Repository.load_filter_list(...) and FilterList #1444

• New Odb.read_header(...) and now Odb.read(...) returns enums.ObjectType instead of int #1450

• Build and CI fixes #1446 #1448 #1455

Changelog

Sourced from pygit2's changelog.

1.19.2 (2026-03-29)

• Fix refcount and error handling issues in filter_register(...)

• Fix config with valueless keys #1457

• New Repository.load_filter_list(...) and FilterList #1444

• New Odb.read_header(...) and now Odb.read(...) returns enums.ObjectType instead of int #1450

• Build and CI fixes #1446 #1448 #1455

1.19.1 (2025-12-29)

• Update wheels to libgit2 1.9.2 and OpenSSL 3.5

• Fix: now diff's getitem/iter returns None for unchanged or binary files #1412

• CI (macOS): arm, intel and pypy wheels (instead of universal) #1441

• CI (pypy): fix tests #1437

1.19.0 (2025-10-23)

• Add support for Python 3.14 and drop 3.10

• Support threaded builds (experimental) #1430 #1435

• Add Linux musl wheels for AArch64

• Add Windows wheels for AArch64; CI: build Windows wheels with cibuildwheel on GitHub #1423

• New Repository.transaction() context manager, returns new ReferenceTransaction #1420

... (truncated)

Commits

• 627c4c1 Release 1.19.2
• be7adf8 Fixed RuntimeError when iterating git config entries with valueless keys. (#1...
• a44a305 Update changelog
• 6b027da fix: set build-backend in pyproject.toml
• 885553b Memory review filter_register with Kimi's help
• 555b1f3 Add Odb.read_header
• b4ed388 Odb.read returns ObjectType enum instead of int
• 070e6b2 Fix signature info in Odb.read's docstring
• 4ad82f8 chore(CI): bump the actions group with 2 updates
• a6b354f Update changelog
• Additional commits viewable in compare view

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