[Security] Bump loofah from 2.2.0 to 2.2.2

Bumps [loofah](https://github.com/flavorjones/loofah) from 2.2.0 to 2.2.2. **This update includes security fixes.**
- [Release notes](https://github.com/flavorjones/loofah/releases)
- [Changelog](https://github.com/flavorjones/loofah/blob/master/CHANGELOG.md)
- [Commits](flavorjones/loofah@v2.2.0...v2.2.2)

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

Gemfile.lock

@@ -144,7 +144,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.2.0)
+    loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)