Bump rake from 10.5.0 to 12.3.3

Bumps [rake](https://github.com/ruby/rake) from 10.5.0 to 12.3.3.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v10.5.0...v12.3.3)

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

Author: dependabot[bot]

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'rake', '~> 10.0'
+gem 'rake', '~> 12.3'
 gem 'rack', '~> 1.0'
 gem 'rack-test', '~> 0.6'
 gem 'activesupport', '~> 4.0'

Gemfile.lock

@@ -125,7 +125,7 @@ GEM
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (12.3.3)
     rdf (1.0.8)
       addressable (>= 2.2)
     redis (4.2.1)
@@ -200,7 +200,7 @@ DEPENDENCIES
   pry
   rack (~> 1.0)
   rack-test (~> 0.6)
-  rake (~> 10.0)
+  rake (~> 12.3)
   rest-client
   rsolr (~> 1.0)
   rubocop