Bump nokogiri from 1.10.8 to 1.13.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.8 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@v1.10.8...v1.13.4)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile

@@ -6,7 +6,7 @@ gem 'faker', '~> 1.8', '>= 1.8.7'
 gem 'carrierwave',             '1.1.0'
 gem 'mini_magick',             '4.9.4'
 gem 'fog'
-gem 'nokogiri', '1.10.8'
+gem 'nokogiri', '1.13.4'
 gem 'will_paginate',           '3.1.6'
 gem 'bootstrap-will_paginate', '1.0.0'
 gem 'bootstrap-sass', '3.4.1'

Gemfile.lock

@@ -290,7 +290,7 @@ GEM
     mime-types-data (3.2016.0521)
     mini_magick (4.9.4)
     mini_mime (1.0.0)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.3)
     minitest-reporters (1.1.19)
       ansi
@@ -303,10 +303,11 @@ GEM
     nicescroll-rails (3.5.4.1)
       railties (>= 3.1)
     nio4r (2.2.0)
-    nokogiri (1.10.8)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.8-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.4-x64-mingw32)
+      racc (~> 1.4)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -320,6 +321,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     puma (3.12.6)
+    racc (1.6.0)
     rack (2.2.3)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
@@ -466,7 +468,7 @@ DEPENDENCIES
   minitest (= 5.10.3)
   minitest-reporters (= 1.1.19)
   nicescroll-rails (~> 3.5, >= 3.5.4.1)
-  nokogiri (= 1.10.8)
+  nokogiri (= 1.13.4)
   pg (= 0.18.4)
   puma (= 3.12.6)
   rails (= 5.1.4)