Bump nokogiri from 1.6.6.2 to 1.13.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.6.6.2 to 1.13.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.13.4/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.6.6.2...v1.13.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -38,7 +38,7 @@ GEM
       tzinfo (~> 1.1)
     arel (6.0.2)
     bson (3.1.2)
-    builder (3.2.2)
+    builder (3.2.4)
     carrierwave (0.10.0)
       activemodel (>= 3.2.0)
       activesupport (>= 3.2.0)
@@ -49,14 +49,16 @@ GEM
       mongoid (>= 3.0, < 5.0)
       mongoid-grid_fs (>= 1.3, < 3.0)
     coderay (1.1.0)
+    concurrent-ruby (1.1.10)
+    crass (1.0.6)
     decent_exposure (2.3.2)
     diff-lcs (1.2.5)
     erubis (2.7.0)
     fabrication (2.13.2)
     ffi (1.9.10)
     formatador (0.2.5)
-    globalid (0.3.5)
-      activesupport (>= 4.1.0)
+    globalid (0.4.2)
+      activesupport (>= 4.2.0)
     guard (2.12.8)
       formatador (>= 0.2.4)
       listen (>= 2.7, <= 4.0)
@@ -71,21 +73,24 @@ GEM
       guard (~> 2.1)
       guard-compat (~> 1.1)
       rspec (>= 2.99.0, < 4.0)
-    i18n (0.7.0)
-    json (1.8.3)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (1.8.6)
     listen (3.0.2)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
-    loofah (2.0.2)
+    loofah (2.16.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
     method_source (0.8.2)
-    mime-types (2.6.1)
+    mime-types (2.99.3)
     mimetype-fu (0.1.2)
-    mini_portile (0.6.2)
-    minitest (5.7.0)
+    mini_mime (1.1.2)
+    mini_portile2 (2.8.0)
+    minitest (5.15.0)
     mongo (2.1.0.beta)
       bson (~> 3.0)
     mongoid (5.0.0.beta)
@@ -97,8 +102,9 @@ GEM
       mime-types (>= 1.0, < 3.0)
       mongoid (>= 3.0, < 5.0)
     nenv (0.2.0)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     notiffany (0.0.6)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -107,7 +113,8 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.4)
+    racc (1.6.0)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)
@@ -121,14 +128,14 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.3)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.6)
-      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 (1.0.2)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.2)
+      loofah (~> 2.3)
     railties (4.2.3)
       actionpack (= 4.2.3)
       activesupport (= 4.2.3)
@@ -170,8 +177,8 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     thor (0.19.1)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
+    thread_safe (0.3.6)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
 
 PLATFORMS