Update libgit2 to 1.5.0, so we can link system-provided libgit2.

diff --git a/Cargo.lock b/Cargo.lock
index 3316015..857299f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1762,9 +1762,9 @@ 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",
@@ -2743,9 +2743,9 @@ checksum = "c0f80d65747a3e43d1596c7c5492d95d5edddaabd45a7fcdb02b95f644164966"
 
 [[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",
diff --git a/lapce-proxy/Cargo.toml b/lapce-proxy/Cargo.toml
index c6d7b4b..318abd9 100644
--- a/lapce-proxy/Cargo.toml
+++ b/lapce-proxy/Cargo.toml
@@ -40,7 +40,7 @@ jsonrpc-lite = "0.6.0"
 serde_json = "1.0.59"
 anyhow = "1.0.32"
 toml_edit = { version = "0.14.4", features = ["easy"] }
-git2 = { version = "0.14.4", features = ["vendored-openssl"] }
+git2 = { version = "0.15.0", features = ["vendored-openssl"] }
 lapce-core = { path = "../lapce-core" }
 lapce-rpc = { path = "../lapce-rpc" }
 trash = "2.1"