Bump nokogiri from 1.6.8 to 1.11.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.6.8 to 1.11.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.6.8...v1.11.4)

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

Gemfile.lock

@@ -47,7 +47,7 @@ GEM
       rake
       thor (>= 0.14.0)
     arel (6.0.3)
-    builder (3.2.2)
+    builder (3.2.4)
     coderay (1.1.1)
     concurrent-ruby (1.0.2)
     coveralls (0.8.13)
@@ -58,38 +58,39 @@ GEM
       tins (~> 1.6.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
+    crass (1.0.6)
     database_cleaner (1.5.3)
     diff-lcs (1.2.5)
     docile (1.1.5)
     erubis (2.7.0)
     generator_spec (0.9.3)
       activesupport (>= 3.0.0)
       railties (>= 3.0.0)
-    globalid (0.3.6)
-      activesupport (>= 4.1.0)
+    globalid (0.4.2)
+      activesupport (>= 4.2.0)
     hashdiff (0.3.0)
-    i18n (0.7.0)
-    json (1.8.3)
-    loofah (2.0.3)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (1.8.6)
+    loofah (2.9.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.6.4)
-      mime-types (>= 1.16, < 4)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
     method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
-    minitest (5.9.0)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
-    pkg-config (1.1.7)
+    mini_mime (1.1.0)
+    mini_portile2 (2.5.1)
+    minitest (5.14.4)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     power_assert (0.3.0)
     pry (0.10.3)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.4)
+    racc (1.5.2)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)
@@ -103,14 +104,14 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.6)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     railties (4.2.6)
       actionpack (= 4.2.6)
       activesupport (= 4.2.6)
@@ -150,9 +151,9 @@ GEM
     test-unit (3.2.0)
       power_assert
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tins (1.6.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     vcr (3.0.3)
     webmock (2.1.0)