Bump nokogiri from 1.6.8.1 to 1.13.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.6.8.1 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@v1.6.8.1...v1.13.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -48,7 +48,7 @@ GEM
       sass (>= 3.3.0)
     bootswatch-rails (3.3.5)
       railties (>= 3.1)
-    builder (3.2.2)
+    builder (3.2.4)
     byebug (5.0.0)
       columnize (= 0.9.0)
     capybara (2.4.4)
@@ -66,6 +66,8 @@ GEM
       execjs
     coffee-script-source (1.9.1.1)
     columnize (0.9.0)
+    concurrent-ruby (1.1.10)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     erubis (2.7.0)
@@ -97,34 +99,37 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     haml (4.0.7)
       tilt
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.3.1)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)
     jquery-rails (4.0.4)
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    json (1.8.6)
     jwt (1.5.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     listen (3.0.3)
       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)
     method_source (0.8.2)
     mime-types (2.6.1)
-    mini_portile2 (2.1.0)
-    minitest (5.8.0)
+    mini_portile2 (2.8.0)
+    minitest (5.15.0)
     multi_json (1.11.2)
     nenv (0.2.0)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     notiffany (0.0.7)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -133,7 +138,8 @@ 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)
@@ -147,14 +153,14 @@ 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)
@@ -209,15 +215,15 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (1.4.1)
     turbolinks (2.5.3)
       coffee-rails
     twilio-ruby (4.3.0)
       builder (>= 2.1.2)
       jwt (~> 1.0)
       multi_json (>= 1.3.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (2.7.1)
       execjs (>= 0.3.0)
@@ -227,7 +233,7 @@ GEM
       binding_of_caller (>= 0.7.2)
       railties (>= 4.0)
       sprockets-rails (>= 2.0, < 4.0)
-    xpath (2.0.0)
+    xpath (2.1.0)
       nokogiri (~> 1.3)
 
 PLATFORMS