Bump git from 1.11.0 to 1.13.0

Bumps [git](https://github.com/ruby-git/ruby-git) from 1.11.0 to 1.13.0.
- [Release notes](https://github.com/ruby-git/ruby-git/releases)
- [Changelog](https://github.com/ruby-git/ruby-git/blob/master/CHANGELOG.md)
- [Commits](ruby-git/ruby-git@v1.11.0...v1.13.0)

---
updated-dependencies:
- dependency-name: git
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -33,7 +33,8 @@ GEM
     ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    git (1.11.0)
+    git (1.13.0)
+      addressable (~> 2.8)
       rchardet (~> 1.8)
     github-pages (227)
       github-pages-health-check (= 1.17.9)