(chore): Upgrade to Rails 5

sass-rails had an issue, so needed to be greater than 5.0.6
rails/sass-rails#381

Gemfile

@@ -1,13 +1,13 @@
 source 'https://rubygems.org'
 
 ruby '2.3.1'
-gem 'rails', '~> 4.2.5'
+gem 'rails', '~> 5.0'
 
 # Use postgresql as the database for Active Record
 gem 'pg'
 
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0'
+gem 'sass-rails', '~> 5.0', '>= 5.0.6' # https://github.com/rails/sass-rails/issues/381
 
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier'

Gemfile.lock

@@ -1,43 +1,45 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.2.7.1)
-      actionpack (= 4.2.7.1)
-      actionview (= 4.2.7.1)
-      activejob (= 4.2.7.1)
+    actioncable (5.0.0.1)
+      actionpack (= 5.0.0.1)
+      nio4r (~> 1.2)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.0.0.1)
+      actionpack (= 5.0.0.1)
+      actionview (= 5.0.0.1)
+      activejob (= 5.0.0.1)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.7.1)
-      actionview (= 4.2.7.1)
-      activesupport (= 4.2.7.1)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.0.0.1)
+      actionview (= 5.0.0.1)
+      activesupport (= 5.0.0.1)
+      rack (~> 2.0)
+      rack-test (~> 0.6.3)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.7.1)
-      activesupport (= 4.2.7.1)
+    actionview (5.0.0.1)
+      activesupport (= 5.0.0.1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (4.2.7.1)
-      activesupport (= 4.2.7.1)
-      globalid (>= 0.3.0)
-    activemodel (4.2.7.1)
-      activesupport (= 4.2.7.1)
-      builder (~> 3.1)
-    activerecord (4.2.7.1)
-      activemodel (= 4.2.7.1)
-      activesupport (= 4.2.7.1)
-      arel (~> 6.0)
-    activesupport (4.2.7.1)
+    activejob (5.0.0.1)
+      activesupport (= 5.0.0.1)
+      globalid (>= 0.3.6)
+    activemodel (5.0.0.1)
+      activesupport (= 5.0.0.1)
+    activerecord (5.0.0.1)
+      activemodel (= 5.0.0.1)
+      activesupport (= 5.0.0.1)
+      arel (~> 7.0)
+    activesupport (5.0.0.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.4.0)
-    arel (6.0.3)
+    arel (7.1.1)
     bcrypt (3.1.11)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
@@ -114,7 +116,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    json (2.0.2)
     kgio (2.10.0)
     launchy (2.4.3)
       addressable (~> 2.3)
@@ -128,6 +130,7 @@ GEM
     mime-types-data (3.2016.0521)
     mini_portile2 (2.1.0)
     minitest (5.9.0)
+    nio4r (1.2.1)
     nokogiri (1.6.8)
       mini_portile2 (~> 2.1.0)
       pkg-config (~> 1.1.7)
@@ -146,26 +149,24 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
-    rack (1.6.4)
+    rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.7.1)
-      actionmailer (= 4.2.7.1)
-      actionpack (= 4.2.7.1)
-      actionview (= 4.2.7.1)
-      activejob (= 4.2.7.1)
-      activemodel (= 4.2.7.1)
-      activerecord (= 4.2.7.1)
-      activesupport (= 4.2.7.1)
+    rails (5.0.0.1)
+      actioncable (= 5.0.0.1)
+      actionmailer (= 5.0.0.1)
+      actionpack (= 5.0.0.1)
+      actionview (= 5.0.0.1)
+      activejob (= 5.0.0.1)
+      activemodel (= 5.0.0.1)
+      activerecord (= 5.0.0.1)
+      activesupport (= 5.0.0.1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.7.1)
-      sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
+      railties (= 5.0.0.1)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.1)
+      activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
     rails_12factor (0.0.3)
@@ -174,9 +175,10 @@ GEM
     rails_layout (1.0.29)
     rails_serve_static_assets (0.0.5)
     rails_stdout_logging (0.0.5)
-    railties (4.2.7.1)
-      actionpack (= 4.2.7.1)
-      activesupport (= 4.2.7.1)
+    railties (5.0.0.1)
+      actionpack (= 5.0.0.1)
+      activesupport (= 5.0.0.1)
+      method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.16.0)
@@ -213,7 +215,7 @@ GEM
     ruby_parser (3.8.2)
       sexp_processor (~> 4.1)
     sass (3.4.22)
-    sass-rails (5.0.5)
+    sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
@@ -236,7 +238,7 @@ GEM
     sprockets (3.7.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.1.1)
+    sprockets-rails (3.2.0)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
@@ -289,14 +291,14 @@ DEPENDENCIES
   pickadate-rails
   poltergeist
   pry-rails
-  rails (~> 4.2.5)
+  rails (~> 5.0)
   rails_12factor
   rails_layout
   rb-fchange
   rb-fsevent
   rb-inotify
   rspec-rails
-  sass-rails (~> 5.0)
+  sass-rails (~> 5.0, >= 5.0.6)
   select2-rails (< 4)
   shoulda-matchers
   simplecov