cargo: bump git2 from 0.14.4 to 0.15.0

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.14.4 to 0.15.0.
- [Release notes](https://github.com/rust-lang/git2-rs/releases)
- [Commits](https://github.com/rust-lang/git2-rs/compare/0.14.4...git2-curl-0.15.0)

---
updated-dependencies:
- dependency-name: git2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -576,9 +576,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.14.4"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0155506aab710a86160ddb504a480d2964d7ab5b9e62419be69e0032bc5931c"
+checksum = "2994bee4a3a6a51eb90c218523be382fd7ea09b16380b9312e9dbe955ff7c7d1"
 dependencies = [
  "bitflags",
  "libc",
@@ -804,9 +804,9 @@ checksum = "efaa7b300f3b5fe8eb6bf21ce3895e1751d9665086af2d64b42f19701015ff4f"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.13.4+1.4.2"
+version = "0.14.0+1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0fa6563431ede25f5cc7f6d803c6afbc1c5d3ad3d4925d12c882bf2b526f5d1"
+checksum = "47a00859c70c8a4f7218e6d1cc32875c4b55f6799445b842b0d8ed5e4c3d959b"
 dependencies = [
  "cc",
  "libc",

Cargo.toml

@@ -42,7 +42,7 @@ clap_mangen = "0.1"
 config = { version = "0.13.1", features = ["toml"] }
 criterion = "0.3.6"
 dirs = "4.0.0"
-git2 = "0.14.4"
+git2 = "0.15.0"
 hex = "0.4.3"
 itertools = "0.10.3"
 jujutsu-lib = { version = "=0.4.0", path = "lib"}

lib/Cargo.toml

@@ -24,7 +24,7 @@ bytes = "1.2.0"
 byteorder = "1.4.3"
 chrono = "0.4.19"
 config = { version = "0.13.1", features = ["toml"] }
-git2 = "0.14.4"
+git2 = "0.15.0"
 hex = "0.4.3"
 itertools = "0.10.3"
 maplit = "1.0.2"