Bump rails from 5.1.3 to 5.1.4 (#4875)

Bumps [rails](https://github.com/rails/rails) from 5.1.3 to 5.1.4.
- [Commits](https://github.com/rails/rails/compare/v5.1.3...v5.1.4)

Gemfile

@@ -6,7 +6,7 @@ ruby '>= 2.3.0', '< 2.5.0'
 gem 'pkg-config', '~> 1.2'
 
 gem 'puma', '~> 3.8'
-gem 'rails', '~> 5.1.0'
+gem 'rails', '~> 5.1.4'
 gem 'uglifier', '~> 3.2'
 
 gem 'hamlit-rails', '~> 0.2'

Gemfile.lock

@@ -1,25 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.1.3)
-      actionpack (= 5.1.3)
+    actioncable (5.1.4)
+      actionpack (= 5.1.4)
       nio4r (~> 2.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.1.3)
-      actionpack (= 5.1.3)
-      actionview (= 5.1.3)
-      activejob (= 5.1.3)
+    actionmailer (5.1.4)
+      actionpack (= 5.1.4)
+      actionview (= 5.1.4)
+      activejob (= 5.1.4)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.3)
-      actionview (= 5.1.3)
-      activesupport (= 5.1.3)
+    actionpack (5.1.4)
+      actionview (= 5.1.4)
+      activesupport (= 5.1.4)
       rack (~> 2.0)
-      rack-test (~> 0.6.3)
+      rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.3)
-      activesupport (= 5.1.3)
+    actionview (5.1.4)
+      activesupport (= 5.1.4)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
@@ -30,16 +30,16 @@ GEM
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.2)
     active_record_query_trace (1.5.4)
-    activejob (5.1.3)
-      activesupport (= 5.1.3)
+    activejob (5.1.4)
+      activesupport (= 5.1.4)
       globalid (>= 0.3.6)
-    activemodel (5.1.3)
-      activesupport (= 5.1.3)
-    activerecord (5.1.3)
-      activemodel (= 5.1.3)
-      activesupport (= 5.1.3)
+    activemodel (5.1.4)
+      activesupport (= 5.1.4)
+    activerecord (5.1.4)
+      activemodel (= 5.1.4)
+      activesupport (= 5.1.4)
       arel (~> 8.0)
-    activesupport (5.1.3)
+    activesupport (5.1.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
       minitest (~> 5.1)
@@ -334,20 +334,20 @@ GEM
     rack-cors (0.4.1)
     rack-protection (2.0.0)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
+    rack-test (0.7.0)
+      rack (>= 1.0, < 3)
     rack-timeout (0.4.2)
-    rails (5.1.3)
-      actioncable (= 5.1.3)
-      actionmailer (= 5.1.3)
-      actionpack (= 5.1.3)
-      actionview (= 5.1.3)
-      activejob (= 5.1.3)
-      activemodel (= 5.1.3)
-      activerecord (= 5.1.3)
-      activesupport (= 5.1.3)
+    rails (5.1.4)
+      actioncable (= 5.1.4)
+      actionmailer (= 5.1.4)
+      actionpack (= 5.1.4)
+      actionview (= 5.1.4)
+      activejob (= 5.1.4)
+      activemodel (= 5.1.4)
+      activerecord (= 5.1.4)
+      activesupport (= 5.1.4)
       bundler (>= 1.3.0)
-      railties (= 5.1.3)
+      railties (= 5.1.4)
       sprockets-rails (>= 2.0.0)
     rails-controller-testing (1.0.2)
       actionpack (~> 5.x, >= 5.0.1)
@@ -363,9 +363,9 @@ GEM
       railties (~> 5.0)
     rails-settings-cached (0.6.6)
       rails (>= 4.2.0)
-    railties (5.1.3)
-      actionpack (= 5.1.3)
-      activesupport (= 5.1.3)
+    railties (5.1.4)
+      actionpack (= 5.1.4)
+      activesupport (= 5.1.4)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
@@ -472,7 +472,7 @@ GEM
     sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.0)
+    sprockets-rails (3.2.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
@@ -588,7 +588,7 @@ DEPENDENCIES
   rack-attack (~> 5.0)
   rack-cors (~> 0.4)
   rack-timeout (~> 0.4)
-  rails (~> 5.1.0)
+  rails (~> 5.1.4)
   rails-controller-testing (~> 1.0)
   rails-i18n (~> 5.0)
   rails-settings-cached (~> 0.6)