Bump pygit2 from 1.20.0 to 1.20.1

[dependabot]

Bumps pygit2 from 1.20.0 to 1.20.1.

Release notes

Sourced from pygit2's releases.

1.20.1 (2026-09-12)

• Update wheels to libgit2 1.9.7

• New exception hierarchy: AlreadyExistsError, InvalidSpecError, InvalidError, NotFoundError, AmbiguousError, AuthError, and CertificateError all inherit from GitError and the appropriate Python built-in exception (ValueError/KeyError) for backward compatibility #830

• Fix DiffDelta.is_binary and DiffDelta.flags returning stale values for deltas obtained from Diff.deltas; flags are now loaded lazily #962 #1100

• Fix repo.submodules.get() and name in repo.submodules raising AlreadyExistsError when a repository exists at the submodule path but was never registered as a submodule; they now return None and False respectively as documented #1487

• Fix BlobIO cleanup deadlock on partial reads #1488 #1491

• Fix leaks and crashes in error paths #1478 #1479 #1480 #1481

• Fix custom ODB and refdb backend callbacks overwriting a pending Python exception (e.g. RuntimeError) with a stale libgit2 error message.

• Documentation fixes #1490

• CI (macOS): build architecture-specific OpenSSL/libssh2/libgit2 dependencies instead of universal binaries, producing smaller wheels.

Changelog

Sourced from pygit2's changelog.

1.20.1 (2026-09-12)

• Update wheels to libgit2 1.9.7

• New exception hierarchy: AlreadyExistsError, InvalidSpecError, InvalidError, NotFoundError, AmbiguousError, AuthError, and CertificateError all inherit from GitError and the appropriate Python built-in exception (ValueError/KeyError) for backward compatibility #830

• Fix DiffDelta.is_binary and DiffDelta.flags returning stale values for deltas obtained from Diff.deltas; flags are now loaded lazily #962 #1100

• Fix repo.submodules.get() and name in repo.submodules raising AlreadyExistsError when a repository exists at the submodule path but was never registered as a submodule; they now return None and False respectively as documented #1487

• Fix BlobIO cleanup deadlock on partial reads #1488 #1491

• Fix leaks and crashes in error paths #1478 #1479 #1480 #1481

• Fix custom ODB and refdb backend callbacks overwriting a pending Python exception (e.g. RuntimeError) with a stale libgit2 error message.

• Documentation fixes #1490

• CI (macOS): build architecture-specific OpenSSL/libssh2/libgit2 dependencies instead of universal binaries, producing smaller wheels.

Commits

• 5a8e1ff Release 1.20.1
• 0620bbf Update changelog
• c33d3e1 Skip non-unicode branchname and status path tests on macOS
• 487817e chore(CI): bump actions/cache from 4 to 6 in the actions group
• 2f9ec69 tests: Add BlobIO test for reading bigger-than-chunk files
• be67bec Fix BlobIO cleanup deadlock
• 4e0803c Clarify Commit.commit_time and commit_time_offset documentation
• 87c2a39 Return None from submodules.get() for a nested plain repository
• d532da7 Update wheels to libgit2 1.9.7
• 1fa0dfe fix(build.sh): clear ci directory without removing mount point
• Additional commits viewable in compare view

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