Bump git from 1.12.0 to 1.13.1 in /ci/danger (#4586)

Bumps [git](https://github.com/ruby-git/ruby-git) from 1.12.0 to 1.13.1.
- [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@v1.12.0...v1.13.1)

---
updated-dependencies:
- dependency-name: git
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Rodrigo Lazo <[email protected]>

Author: dependabot[bot]

ci/danger/Gemfile.lock

@@ -49,7 +49,7 @@ GEM
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
     faraday-retry (1.0.3)
-    git (1.12.0)
+    git (1.13.1)
       addressable (~> 2.8)
       rchardet (~> 1.8)
     kramdown (2.4.0)
@@ -63,7 +63,7 @@ GEM
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     open4 (1.3.4)
-    public_suffix (5.0.0)
+    public_suffix (5.0.1)
     rchardet (1.8.0)
     rexml (3.2.5)
     ruby2_keywords (0.0.5)