fix(deps): update dependency pygit2 to v1.18.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pygit2 (changelog)	==1.16.0 -> ==1.18.0
pygit2 (changelog)	==1.15.0 -> ==1.18.0

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Release Notes

libgit2/pygit2 (pygit2)

v1.18.0

Compare Source

• Upgrade Linux Glibc wheels to manylinux_2_28

• Add RemoteCallbacks.push_transfer_progress(...) callback
  #​1345

• New bool(oid)
  #​1347

• Now Repository.merge(...) accepts a commit or reference object
  #​1348

• New threads optional argument in Remote.push(...)
  #​1352

• New proxy optional argument in clone_repository(...)
  #​1354

• New optional arguments context_lines and interhunk_lines in Blob.diff(...) ; and
  now Repository.diff(...) honors these two arguments when the objects diffed are blobs.
  #​1360

• Now Tree.diff_to_workdir(...) accepts keyword arguments, not just positional.

• Fix when a reference name has non UTF-8 chars
  #​1329

• Fix condition check in Repository.remotes.rename(...)
  #​1342

• Add codespell workflow, fix a number of typos
  #​1344

• Documentation and typing
  #​1343
  #​1347
  #​1356

• CI: Use ARM runner for tests and wheels
  #​1346

• Build and CI updates
  #​1363
  #​1365

Deprecations:

• Passing str to Repository.merge(...) is deprecated,
  instead pass an oid object (or a commit, or a reference)
  #​1349

Breaking changes:

• Keyword argument flag has been renamed to flags in Blob.diff(...) and
  Blob.diff_to_buffer(...)

v1.17.0

Compare Source

• Upgrade to libgit2 1.9

• Add certificate_check callback to Remote.ls_remotes(...)
  #​1326

• Fix build with GCC 14
  #​1324

• Release wheels for PyPy
  #​1336
  #​1339

• CI: update tests for macOS to use OpenSSL 3
  #​1335

• Documentation: fix typo in Repository.status(...) docstring
  #​1327

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