Bump redcarpet from 3.2.2 to 3.5.1

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.2.2 to 3.5.1.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](vmg/redcarpet@v3.2.2...v3.5.1)

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

Gemfile.lock

@@ -1,9 +1,3 @@
-GIT
-  remote: https://github.com/jetthoughts/yaml_db.git
-  revision: 5f73cbd14adee939adf08574ec3bf6e05ee55889
-  specs:
-    yaml_db (0.2.3)
-
 GIT
   remote: https://github.com/ambethia/recaptcha
   revision: 76c2f58ee906ed591662d552c6be383024af11d6
@@ -47,6 +41,12 @@ GIT
       rails (~> 4)
       sass
 
+GIT
+  remote: https://github.com/jetthoughts/yaml_db
+  revision: 5f73cbd14adee939adf08574ec3bf6e05ee55889
+  specs:
+    yaml_db (0.2.3)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -268,7 +268,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
-    redcarpet (3.2.2)
+    redcarpet (3.5.1)
     ref (1.0.5)
     remotipart (1.2.1)
     responders (1.1.2)
@@ -319,7 +319,6 @@ GEM
       multi_json (~> 1.0)
       simplecov-html (~> 0.8.0)
     simplecov-html (0.8.0)
-    slop (3.6.0)
     spreadsheet (1.0.0)
       ruby-ole (>= 1.0)
     sprockets (2.12.5)