Bump loofah from 2.3.0 to 2.3.1

Bumps [loofah](https://github.com/flavorjones/loofah) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/flavorjones/loofah/releases)
- [Changelog](https://github.com/flavorjones/loofah/blob/master/CHANGELOG.md)
- [Commits](flavorjones/loofah@v2.3.0...v2.3.1)

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

Gemfile.lock

@@ -78,7 +78,7 @@ GEM
     banzai (0.1.3)
     builder (3.2.3)
     concurrent-ruby (1.1.5)
-    crass (1.0.4)
+    crass (1.0.5)
     deep_merge (1.2.1)
     diff-lcs (1.3)
     dotenv (2.7.5)
@@ -90,7 +90,7 @@ GEM
     hash-deep-merge (0.1.1)
     i18n (1.7.0)
       concurrent-ruby (~> 1.0)
-    loofah (2.3.0)
+    loofah (2.3.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -108,7 +108,7 @@ GEM
       mustermann (= 1.0.3)
     neatjson (0.9)
     nio4r (2.5.2)
-    nokogiri (1.10.4)
+    nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     oas_parser (0.22.4)
       activesupport (>= 4.0.0)