Update Redcarpet to 3.3.0

Fixes #1432

Gemfile

@@ -94,7 +94,7 @@ gem "seed-fu"
 gem 'html-pipeline', '~> 1.11.0'
 gem 'task_list',     '1.0.2', require: 'task_list/railtie'
 gem 'github-markup'
-gem 'redcarpet',     '~> 3.2.3'
+gem 'redcarpet',     '~> 3.3.0'
 gem 'RedCloth'
 gem 'rdoc',          '~>3.6'
 gem 'org-ruby',      '= 0.9.12'

Gemfile.lock

@@ -499,7 +499,7 @@ GEM
       trollop
     rdoc (3.12.2)
       json (~> 1.4)
-    redcarpet (3.2.3)
+    redcarpet (3.3.1)
     redis (3.1.0)
     redis-actionpack (4.0.0)
       actionpack (~> 4)
@@ -810,7 +810,7 @@ DEPENDENCIES
   rails (~> 4.1.0)
   raphael-rails (~> 2.1.2)
   rdoc (~> 3.6)
-  redcarpet (~> 3.2.3)
+  redcarpet (~> 3.3.0)
   redis-rails
   request_store
   rerun (~> 0.10.0)