Bump rails-html-sanitizer from 1.3.0 to 1.4.3

Bumps [rails-html-sanitizer](https://github.com/rails/rails-html-sanitizer) from 1.3.0 to 1.4.3.
- [Release notes](https://github.com/rails/rails-html-sanitizer/releases)
- [Changelog](https://github.com/rails/rails-html-sanitizer/blob/master/CHANGELOG.md)
- [Commits](rails/rails-html-sanitizer@v1.3.0...v1.4.3)

---
updated-dependencies:
- dependency-name: rails-html-sanitizer
  dependency-type: indirect
...

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

Gemfile.lock

@@ -194,7 +194,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.4.0)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.13)
@@ -244,7 +244,7 @@ GEM
     psych (3.0.3)
     public_suffix (4.0.6)
     puma (3.12.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rack-cors (1.0.5)
       rack (>= 1.6.0)
@@ -270,7 +270,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
     rails-i18n (5.1.2)
       i18n (>= 0.7, < 2)