build: bump git2 from 0.13.19 to 0.13.20 (#2753)

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.13.19 to 0.13.20.
- [Release notes](https://github.com/rust-lang/git2-rs/releases)
- [Commits](https://github.com/rust-lang/git2-rs/compare/0.13.19...0.13.20)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -655,9 +655,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.13.19"
+version = "0.13.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17929de7239dea9f68aa14f94b2ab4974e7b24c1314275ffcc12a7758172fa18"
+checksum = "d9831e983241f8c5591ed53f17d874833e2fa82cac2625f3888c50cbfe136cba"
 dependencies = [
  "bitflags 1.2.1",
  "libc",
@@ -783,9 +783,9 @@ checksum = "18794a8ad5b29321f790b55d93dfba91e125cb1a9edbd4f8e3150acc771c1a5e"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.12.20+1.1.0"
+version = "0.12.21+1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e2f09917e00b9ad194ae72072bb5ada2cca16d8171a43e91ddba2afbb02664b"
+checksum = "86271bacd72b2b9e854c3dcfb82efd538f15f870e4c11af66900effb462f6825"
 dependencies = [
  "cc",
  "libc",

Cargo.toml

@@ -33,7 +33,7 @@ tls-vendored = ["native-tls/vendored"]
 clap = "2.33.3"
 ansi_term = "0.12.1"
 dirs-next = "2.0.0"
-git2 = { version = "0.13.19", default-features = false }
+git2 = { version = "0.13.20", default-features = false }
 toml = { version = "0.5.8", features = ["preserve_order"] }
 rust-ini = "0.17.0"
 serde_json = "1.0.64"