Bump rake from 10.5.0 to 12.3.2 (#286)

Bumps [rake](https://github.com/ruby/rake) from 10.5.0 to 12.3.2.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v10.5.0...v12.3.2)

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

Gemfile

@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 ruby "2.1.2"
 gem "rails", "~>3.2"
-gem 'rake',  '~> 10.5.0'
+gem 'rake',  '~> 12.3.2'
 
 gem "will_paginate", "3.1.6"
 gem "will_paginate-bootstrap"

Gemfile.lock

@@ -115,7 +115,7 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
-    rake (10.5.0)
+    rake (12.3.2)
     rdiscount (2.1.7.1)
     rdoc (3.12.2)
       json (~> 1.4)
@@ -169,7 +169,7 @@ DEPENDENCIES
   paperclip (~> 4.2.2)
   passenger
   rails (~> 3.2)
-  rake (~> 10.5.0)
+  rake (~> 12.3.2)
   rdiscount (= 2.1.7.1)
   recaptcha
   right_aws