Bump rugged from 1.6.3 to 1.7.2

Bumps [rugged](https://github.com/libgit2/rugged) from 1.6.3 to 1.7.2.
- [Release notes](https://github.com/libgit2/rugged/releases)
- [Changelog](https://github.com/libgit2/rugged/blob/master/CHANGELOG.md)
- [Commits](libgit2/rugged@v1.6.3...v1.7.2)

---
updated-dependencies:
- dependency-name: rugged
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -112,7 +112,7 @@ GEM
     rubocop-rspec (2.11.1)
       rubocop (~> 1.19)
     ruby-progressbar (1.13.0)
-    rugged (1.6.3)
+    rugged (1.7.2)
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)