build: bump rails from 5.1.4 to 5.1.5 (#106)

Bumps [rails](https://github.com/rails/rails) from 5.1.4 to 5.1.5.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](rails/rails@v5.1.4...v5.1.5)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -8,7 +8,7 @@ git_source(:github) do |repo_name|
 end
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.1.4'
+gem 'rails', '~> 5.1.5'
 # Use mysql as the database for Active Record
 gem 'mysql2', '>= 0.3.18', '< 0.5'
 # Use Puma as the app server

Gemfile.lock

@@ -1,43 +1,43 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.1.4)
-      actionpack (= 5.1.4)
+    actioncable (5.1.5)
+      actionpack (= 5.1.5)
       nio4r (~> 2.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.1.4)
-      actionpack (= 5.1.4)
-      actionview (= 5.1.4)
-      activejob (= 5.1.4)
+    actionmailer (5.1.5)
+      actionpack (= 5.1.5)
+      actionview (= 5.1.5)
+      activejob (= 5.1.5)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.4)
-      actionview (= 5.1.4)
-      activesupport (= 5.1.4)
+    actionpack (5.1.5)
+      actionview (= 5.1.5)
+      activesupport (= 5.1.5)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.4)
-      activesupport (= 5.1.4)
+    actionview (5.1.5)
+      activesupport (= 5.1.5)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.1.4)
-      activesupport (= 5.1.4)
+    activejob (5.1.5)
+      activesupport (= 5.1.5)
       globalid (>= 0.3.6)
-    activemodel (5.1.4)
-      activesupport (= 5.1.4)
+    activemodel (5.1.5)
+      activesupport (= 5.1.5)
     activemodel-serializers-xml (1.0.2)
       activemodel (> 5.x)
       activesupport (> 5.x)
       builder (~> 3.1)
-    activerecord (5.1.4)
-      activemodel (= 5.1.4)
-      activesupport (= 5.1.4)
+    activerecord (5.1.5)
+      activemodel (= 5.1.5)
+      activesupport (= 5.1.5)
       arel (~> 8.0)
-    activesupport (5.1.4)
+    activesupport (5.1.5)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
       minitest (~> 5.1)
@@ -76,7 +76,7 @@ GEM
       activemodel-serializers-xml (~> 1.0)
       activesupport (~> 5.0)
       request_store (~> 1.0)
-    erubi (1.7.0)
+    erubi (1.7.1)
     erubis (2.7.0)
     execjs (2.7.0)
     factory_bot (4.8.2)
@@ -87,7 +87,7 @@ GEM
     ffi (1.9.21)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
-    i18n (0.9.4)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     jbuilder (2.7.0)
       activesupport (>= 4.2.0)
@@ -97,7 +97,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.1.1)
+    loofah (2.2.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -113,7 +113,7 @@ GEM
       power_assert (>= 1.1)
     multi_json (1.13.1)
     mysql2 (0.4.10)
-    nio4r (2.2.0)
+    nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     parallel (1.12.1)
@@ -132,20 +132,20 @@ GEM
     public_suffix (3.0.1)
     puma (3.11.3)
     rack (2.0.4)
-    rack-test (0.8.2)
+    rack-test (0.8.3)
       rack (>= 1.0, < 3)
     railroady (1.5.3)
-    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)
+    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)
       bundler (>= 1.3.0)
-      railties (= 5.1.4)
+      railties (= 5.1.5)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
@@ -160,9 +160,9 @@ GEM
       json
       require_all
       ruby-progressbar
-    railties (5.1.4)
-      actionpack (= 5.1.4)
-      activesupport (= 5.1.4)
+    railties (5.1.5)
+      actionpack (= 5.1.5)
+      activesupport (= 5.1.5)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
@@ -251,7 +251,7 @@ DEPENDENCIES
   pry-rails
   puma (~> 3.11)
   railroady
-  rails (~> 5.1.4)
+  rails (~> 5.1.5)
   rails_best_practices
   rubocop
   sass-rails (~> 5.0)