Upgrade RSpec to 3.1 to fix DEPRECATION WARNING

Author: huacnlee

Gemfile

@@ -101,7 +101,7 @@ gem 'rack-utf8_sanitizer'
 group :development, :test do
   gem 'capistrano', '2.9.0', require: false
   gem 'rvm-capistrano', require: false
-  gem 'rspec-rails', '~> 3.0.1'
+  gem 'rspec-rails', '~> 3.1'
   gem 'factory_girl_rails', '1.4.0'
   gem 'database_cleaner'
   gem 'capybara', '~> 2.3.0'

Gemfile.lock

@@ -303,8 +303,8 @@ GEM
       sprockets-rails (~> 3.0.0.beta1)
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.3)
-      activesupport
+    rails-dom-testing (1.0.4)
+      activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.1)
@@ -333,22 +333,22 @@ GEM
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
     rouge (1.3.4)
-    rspec-core (3.0.4)
-      rspec-support (~> 3.0.0)
-    rspec-expectations (3.0.4)
+    rspec-core (3.1.7)
+      rspec-support (~> 3.1.0)
+    rspec-expectations (3.1.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.0.0)
-    rspec-mocks (3.0.4)
-      rspec-support (~> 3.0.0)
-    rspec-rails (3.0.2)
+      rspec-support (~> 3.1.0)
+    rspec-mocks (3.1.3)
+      rspec-support (~> 3.1.0)
+    rspec-rails (3.1.0)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.0.0)
-      rspec-expectations (~> 3.0.0)
-      rspec-mocks (~> 3.0.0)
-      rspec-support (~> 3.0.0)
-    rspec-support (3.0.4)
+      rspec-core (~> 3.1.0)
+      rspec-expectations (~> 3.1.0)
+      rspec-mocks (~> 3.1.0)
+      rspec-support (~> 3.1.0)
+    rspec-support (3.1.2)
     rvm-capistrano (1.4.1)
       capistrano (>= 2.0.0)
     sass (3.4.5)
@@ -467,7 +467,7 @@ DEPENDENCIES
   redis-namespace (~> 1.3.1)
   redis-objects (= 0.9.1)
   rouge (~> 1.3.4)
-  rspec-rails (~> 3.0.1)
+  rspec-rails (~> 3.1)
   rvm-capistrano
   sass-rails (~> 5.0.0.beta1)
   settingslogic (~> 2.0.9)