Bump reverse_markdown from 1.1.0 to 2.1.1

Bumps [reverse_markdown](https://github.com/xijo/reverse_markdown) from 1.1.0 to 2.1.1.
- [Release notes](https://github.com/xijo/reverse_markdown/releases)
- [Changelog](https://github.com/xijo/reverse_markdown/blob/master/CHANGELOG.md)
- [Commits](xijo/reverse_markdown@v1.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: reverse_markdown
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -514,7 +514,7 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     retriable (3.1.2)
-    reverse_markdown (1.1.0)
+    reverse_markdown (2.1.1)
       nokogiri
     rexml (3.2.5)
     rspec (3.11.0)