Bump rails from 5.1.5 to 5.1.6

Bumps [rails](https://github.com/rails/rails) from 5.1.5 to 5.1.6.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](rails/rails@v5.1.5...v5.1.6)

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

Gemfile

@@ -5,7 +5,7 @@ git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
 end
 
-gem 'rails', '~> 5.1.5'
+gem 'rails', '~> 5.1.6'
 gem 'pg', '= 0.21.0'
 gem 'puma', '~> 3.11'
 gem 'sass-rails', '~> 5.0'

Gemfile.lock

@@ -1,41 +1,41 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.1.5)
-      actionpack (= 5.1.5)
+    actioncable (5.1.6)
+      actionpack (= 5.1.6)
       nio4r (~> 2.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.1.5)
-      actionpack (= 5.1.5)
-      actionview (= 5.1.5)
-      activejob (= 5.1.5)
+    actionmailer (5.1.6)
+      actionpack (= 5.1.6)
+      actionview (= 5.1.6)
+      activejob (= 5.1.6)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.5)
-      actionview (= 5.1.5)
-      activesupport (= 5.1.5)
+    actionpack (5.1.6)
+      actionview (= 5.1.6)
+      activesupport (= 5.1.6)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.5)
-      activesupport (= 5.1.5)
+    actionview (5.1.6)
+      activesupport (= 5.1.6)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.1.5)
-      activesupport (= 5.1.5)
+    activejob (5.1.6)
+      activesupport (= 5.1.6)
       globalid (>= 0.3.6)
-    activemodel (5.1.5)
-      activesupport (= 5.1.5)
-    activerecord (5.1.5)
-      activemodel (= 5.1.5)
-      activesupport (= 5.1.5)
+    activemodel (5.1.6)
+      activesupport (= 5.1.6)
+    activerecord (5.1.6)
+      activemodel (= 5.1.6)
+      activesupport (= 5.1.6)
       arel (~> 8.0)
-    activesupport (5.1.5)
+    activesupport (5.1.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.5.2)
@@ -72,12 +72,12 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     crass (1.0.3)
-    erubi (1.7.0)
+    erubi (1.7.1)
     execjs (2.7.0)
     ffi (1.9.23)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
-    i18n (0.9.5)
+    i18n (1.0.0)
       concurrent-ruby (~> 1.0)
     jbuilder (2.7.0)
       activesupport (>= 4.2.0)
@@ -102,7 +102,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.2.0)
+    loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -112,7 +112,7 @@ GEM
     mini_portile2 (2.3.0)
     minitest (5.11.3)
     multi_json (1.12.2)
-    nio4r (2.2.0)
+    nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     parallel (1.12.1)
@@ -126,33 +126,33 @@ GEM
     rack (2.0.4)
     rack-proxy (0.6.3)
       rack
-    rack-test (0.8.3)
+    rack-test (1.0.0)
       rack (>= 1.0, < 3)
-    rails (5.1.5)
-      actioncable (= 5.1.5)
-      actionmailer (= 5.1.5)
-      actionpack (= 5.1.5)
-      actionview (= 5.1.5)
-      activejob (= 5.1.5)
-      activemodel (= 5.1.5)
-      activerecord (= 5.1.5)
-      activesupport (= 5.1.5)
+    rails (5.1.6)
+      actioncable (= 5.1.6)
+      actionmailer (= 5.1.6)
+      actionpack (= 5.1.6)
+      actionview (= 5.1.6)
+      activejob (= 5.1.6)
+      activemodel (= 5.1.6)
+      activerecord (= 5.1.6)
+      activesupport (= 5.1.6)
       bundler (>= 1.3.0)
-      railties (= 5.1.5)
+      railties (= 5.1.6)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    railties (5.1.5)
-      actionpack (= 5.1.5)
-      activesupport (= 5.1.5)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    railties (5.1.6)
+      actionpack (= 5.1.6)
+      activesupport (= 5.1.6)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
-    rake (12.3.0)
+    rake (12.3.1)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -244,7 +244,7 @@ DEPENDENCIES
   pg (= 0.21.0)
   popper_js (~> 1.12.9)
   puma (~> 3.11)
-  rails (~> 5.1.5)
+  rails (~> 5.1.6)
   redis (~> 4.0)
   rubocop (~> 0.54.0)
   sass-rails (~> 5.0)