Bump nokogiri from 1.11.4 to 1.13.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.11.4 to 1.13.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.11.4...v1.13.6)

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

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

Gemfile

@@ -53,7 +53,7 @@ gem 'activesupport'
 gem 'facter', require: nil
 gem 'maxmind-db'
 gem 'json', '>= 2.3.0'
-gem 'nokogiri', '= 1.11.4'
+gem 'nokogiri', '1.13.6'
 
 group :development, :test do
   gem 'pry'

Gemfile.lock

@@ -143,7 +143,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.0904)
     mini_mime (1.1.2)
-    mini_portile2 (2.5.3)
+    mini_portile2 (2.8.0)
     minitest (5.11.3)
     minitest-reporters (1.3.8)
       ansi
@@ -166,10 +166,10 @@ GEM
     net-ssh (5.2.0)
     netrc (0.11.0)
     nio4r (2.5.8)
-    nokogiri (1.11.4)
+    nokogiri (1.13.6)
-      mini_portile2 (~> 2.5.0)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.11.4-x86_64-linux)
+    nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
     nokogumbo (2.0.2)
       nokogiri (~> 1.8, >= 1.8.4)
@@ -338,7 +338,7 @@ DEPENDENCIES
   mock_redis
   monetize
   msgpack
-  nokogiri (= 1.11.4)
+  nokogiri (= 1.13.6)
   paypal-recurring
   pg
   pry