Upgrade rspec-rails from 3.4.2 to 3.5.0.

Also upgrade its dependencies. Includes Rails 5 support.

Changelogs:
rspec-rails: https://github.com/rspec/rspec-rails/compare/v3.4.2...v3.5.0
rspec-core: https://github.com/rspec/rspec-core/compare/v3.4.0...v3.5.0
rspec-support: https://github.com/rspec/rspec-support/compare/v3.4.0...v3.5.0
rspec-expectations: https://github.com/rspec/rspec-expectations/compare/v3.4.0...v3.5.0
rspec-mocks: https://github.com/rspec/rspec-mocks/compare/v3.4.0...v3.5.0
rspec: https://github.com/rspec/rspec/compare/v3.4.0...v3.5.0

Gemfile

@@ -276,7 +276,7 @@ group :development, :test do
 
   gem 'database_cleaner',   '~> 1.4.0'
   gem 'factory_girl_rails', '~> 4.6.0'
-  gem 'rspec-rails',        '~> 3.4.0'
+  gem 'rspec-rails',        '~> 3.5.0'
   gem 'rspec-retry'
   gem 'spinach-rails',      '~> 0.2.1'
   gem 'spinach-rerun-reporter', '~> 0.0.2'

Gemfile.lock

@@ -585,29 +585,29 @@ GEM
       chunky_png
     rqrcode-rails3 (0.1.7)
       rqrcode (>= 0.4.2)
-    rspec (3.4.0)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-    rspec-core (3.4.4)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
+    rspec (3.5.0)
+      rspec-core (~> 3.5.0)
+      rspec-expectations (~> 3.5.0)
+      rspec-mocks (~> 3.5.0)
+    rspec-core (3.5.0)
+      rspec-support (~> 3.5.0)
+    rspec-expectations (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.1)
+      rspec-support (~> 3.5.0)
+    rspec-mocks (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-rails (3.4.2)
-      actionpack (>= 3.0, < 4.3)
-      activesupport (>= 3.0, < 4.3)
-      railties (>= 3.0, < 4.3)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-      rspec-support (~> 3.4.0)
+      rspec-support (~> 3.5.0)
+    rspec-rails (3.5.0)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 3.5.0)
+      rspec-expectations (~> 3.5.0)
+      rspec-mocks (~> 3.5.0)
+      rspec-support (~> 3.5.0)
     rspec-retry (0.4.5)
       rspec-core
-    rspec-support (3.4.1)
+    rspec-support (3.5.0)
     rubocop (0.40.0)
       parser (>= 2.3.1.0, < 3.0)
       powerpack (~> 0.1)
@@ -936,7 +936,7 @@ DEPENDENCIES
   responders (~> 2.0)
   rouge (~> 1.11)
   rqrcode-rails3 (~> 0.1.7)
-  rspec-rails (~> 3.4.0)
+  rspec-rails (~> 3.5.0)
   rspec-retry
   rubocop (~> 0.40.0)
   rubocop-rspec (~> 1.5.0)