Bump loofah from 2.4.0 to 2.19.1

Bumps [loofah](https://github.com/flavorjones/loofah) from 2.4.0 to 2.19.1.
- [Release notes](https://github.com/flavorjones/loofah/releases)
- [Changelog](https://github.com/flavorjones/loofah/blob/main/CHANGELOG.md)
- [Commits](https://github.com/flavorjones/loofah/compare/v2.4.0...v2.19.1)

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

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

Gemfile.lock

@@ -67,7 +67,7 @@ GEM
     concurrent-ruby (1.1.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    crass (1.0.5)
+    crass (1.0.6)
     debug_inspector (0.0.3)
     delayed_job (4.1.8)
       activesupport (>= 3.0, < 6.1)
@@ -115,7 +115,7 @@ GEM
     jwt (2.2.1)
     launchy (2.4.3)
       addressable (~> 2.3)
-    loofah (2.4.0)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -123,16 +123,19 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.6.1)
     minitest (5.13.0)
     multi_json (1.14.1)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     nio4r (2.5.2)
-    nokogiri (1.10.7)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     oauth2 (1.4.3)
       faraday (>= 0.8, < 2.0)
       jwt (>= 1.0, < 3.0)
@@ -154,6 +157,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.3)
     puma (3.12.1)
+    racc (1.6.1)
     rack (2.2.2)
     rack-proxy (0.6.5)
       rack