Bump git2 from 0.13.18 to 0.13.20

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.13.18 to 0.13.20.
- [Release notes](https://github.com/rust-lang/git2-rs/releases)
- [Commits](https://github.com/rust-lang/git2-rs/compare/0.13.18...0.13.20)

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

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

Cargo.lock

@@ -895,9 +895,9 @@ checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
 
 [[package]]
 name = "git2"
-version = "0.13.18"
+version = "0.13.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b483c6c2145421099df1b4efd50e0f6205479a072199460eff852fa15e5603c7"
+checksum = "d9831e983241f8c5591ed53f17d874833e2fa82cac2625f3888c50cbfe136cba"
 dependencies = [
  "bitflags",
  "libc",
@@ -1197,9 +1197,9 @@ checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.12.19+1.1.0"
+version = "0.12.21+1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f322155d574c8b9ebe991a04f6908bb49e68a79463338d24a43d6274cb6443e6"
+checksum = "86271bacd72b2b9e854c3dcfb82efd538f15f870e4c11af66900effb462f6825"
 dependencies = [
  "cc",
  "libc",

Cargo.toml

@@ -20,7 +20,7 @@ bytes = "1.0.1"
 config = { version = "0.11.0", features = ["toml"] }
 dotenv = "0.15.0"
 futures = "0.3.15"
-git2 = "0.13.18"
+git2 = "0.13.20"
 lazy_static = "1.4.0"
 number_prefix = "0.4.0"
 openssl-probe = "0.1.4"