chore(deps): bump git2 from 0.20.4 to 0.21.0

[dependabot]

Bumps git2 from 0.20.4 to 0.21.0.

Changelog

Sourced from git2's changelog.

0.21.0 - TBD

0.20.4...main

Added

• Added experimental SHA256 repository support behind the new unstable-sha256 Cargo feature, along with *_ext API variants that accept an ObjectFormat. #1206
• Added opts::set_cache_max_size() and opts::get_cached_memory(). #1188
• Added Repository::object_format() and a new ObjectFormat enum. #1204
• Added Repository::set_config(). #1208
• Added merge_file() along with MergeFileInput. #1210
• Added Repository::refdb_compress() for packing loose refs. #1221
• Added public Refdb type, along with Repository::refdb() and Repository::set_refdb(). Repository::refdb_compress() now delegates to Refdb::compress(). #1228
• Added Revspec::into_objects(). #1230
• Added BlameHunk::final_committer(), BlameHunk::orig_committer(), BlameHunk::summary(), and BlameHunk::summary_bytes(). #1231
• Implemented Clone for Reference. #1233
• Added Repository::author_from_env() and Repository::committer_from_env(). #1237
• Added impl From<Utf8Error> for Error. #1239

Changed

• ❗ The ssh, https, and cred Cargo features are no longer enabled by default. Previously default = ["ssh", "https"]; now default = []. Enable them explicitly if you rely on credential helpers or transport support. #1168
• ❗ CredentialHelper and the url dependency are now gated behind the new cred Cargo feature. Enabling ssh or https transitively enables cred. #1168
• ❗ Updated to the 2021 edition. #1173
• ❗ Many string accessors that previously returned Option<&str> now return Result<&str, Error> or Result<Option<&str>, Error>, so callers can distinguish a missing value from a non-UTF-8 one. #1241
• ❗ BlameHunk::final_signature, BlameHunk::final_committer, BlameHunk::orig_signature, and BlameHunk::orig_committer now return Option to avoid segfaults when signature information is missing. #1254
• Bumped requirement to libgit2-sys 0.18.4, which updates libgit2 to 1.9.3.

... (truncated)

Commits

• dffaf27 Merge pull request #1256 from weihanglo/changelog
• 84b9c76 docs: changelog for git2@0.21
• 8c6dc4a Merge pull request #1206 from weihanglo/sha256-git2
• 7bd145e fix: import ObjectFormat in one place
• fc8af6a test(oid): split _ext to test each format separately
• b9bde87 test: oid length sanity check
• 57a68e0 feat(oid): impl Display for ObjectFormat
• 7acee09 chore(ci): test git2 sha256 support
• bdf5b7b fix: init example with --object-format option
• 9fb4e6a refactor(util): drop unsafe from zeroed_raw_oid
• Additional commits viewable in compare view

You can trigger a rebase of this PR by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

Assignees

The following users could not be added as assignees: apache/iggy-committers. Either the username does not exist or it does not have the correct permissions to be added as an assignee.

Please fix the above issues or remove invalid values from dependabot.yml.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.