Bump git2 from 0.13.25 to 0.14.0 (#1869)

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.13.25 to 0.14.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="30f013875e"><code>30f0138</code></a> Bump versions</li>
<li><a href="7603309738"><code>7603309</code></a> Update libgit2 (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/527">#527</a>)</li>
<li><a href="d70b64599a"><code>d70b645</code></a> Make all callbacks optional in libgit2-sys</li>
<li><a href="d34e49cc12"><code>d34e49c</code></a> Remove unnecessary parentheses. (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/526">#526</a>)</li>
<li><a href="08114526f8"><code>0811452</code></a> Add Repository::fetchhead_to_annotated_commit (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/524">#524</a>)</li>
<li><a href="666aeab349"><code>666aeab</code></a> Bump version numbers of crates</li>
<li><a href="ecd56b00fb"><code>ecd56b0</code></a> Tie Patch lifetime to its input buffers (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/523">#523</a>)</li>
<li><a href="9071a87bad"><code>9071a87</code></a> Add <code>Branch::get_mut()</code> (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/522">#522</a>)</li>
<li><a href="850c9b96d5"><code>850c9b9</code></a> Update the libgit2 submodule to v0.99.0 (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/520">#520</a>)</li>
<li><a href="147c5b4f02"><code>147c5b4</code></a> Add examples (<a href="https://github-redirect.dependabot.com/rust-lang/git2-rs/issues/519">#519</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/rust-lang/git2-rs/compare/0.13.25...git2-curl-0.14.0">compare view</a></li>
</ul>
</details>
<br />


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</details>

Cargo.lock

@@ -529,9 +529,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.13.25"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f29229cc1b24c0e6062f6e742aa3e256492a5323365e5ed3413599f8a5eff7d6"
+checksum = "94781080dd1a6b55dea7c46540d5bac87742a22f6dc2d84e54a5071ad6f0e387"
 dependencies = [
  "bitflags",
  "libc",
@@ -694,9 +694,9 @@ checksum = "1bf2e165bb3457c8e098ea76f3e3bc9db55f87aa90d52d0e6be741470916aaa4"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.12.26+1.3.0"
+version = "0.13.0+1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19e1c899248e606fbfe68dcb31d8b0176ebab833b103824af31bddf4b7457494"
+checksum = "864e22fc06cae62860398cd854c93d5867f11c02ec916aa1417b440f170df23a"
 dependencies = [
  "cc",
  "libc",