Update rails to 4.2 in gemspec

refs #161

I tried it

Gemfile.lock

@@ -15,7 +15,7 @@ PATH
       kramdown (> 1.0.0)
       kramdown-haml
       puma
-      rails (~> 4.1.7)
+      rails (~> 4.2.0)
       rubyzip (~> 1.1)
       sass-rails (~> 4.0.3)
       settingslogic
@@ -25,34 +25,43 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.1.9)
+    actionmailer (4.2.1)
-      actionpack (= 4.1.9)
+      actionpack (= 4.2.1)
-      actionview (= 4.1.9)
+      actionview (= 4.2.1)
+      activejob (= 4.2.1)
       mail (~> 2.5, >= 2.5.4)
-    actionpack (4.1.9)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
-      actionview (= 4.1.9)
+    actionpack (4.2.1)
-      activesupport (= 4.1.9)
+      actionview (= 4.2.1)
-      rack (~> 1.5.2)
+      activesupport (= 4.2.1)
+      rack (~> 1.6)
       rack-test (~> 0.6.2)
-    actionview (4.1.9)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
-      activesupport (= 4.1.9)
+      rails-html-sanitizer (~> 1.0, >= 1.0.1)
+    actionview (4.2.1)
+      activesupport (= 4.2.1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-    activemodel (4.1.9)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
-      activesupport (= 4.1.9)
+      rails-html-sanitizer (~> 1.0, >= 1.0.1)
+    activejob (4.2.1)
+      activesupport (= 4.2.1)
+      globalid (>= 0.3.0)
+    activemodel (4.2.1)
+      activesupport (= 4.2.1)
       builder (~> 3.1)
-    activerecord (4.1.9)
+    activerecord (4.2.1)
-      activemodel (= 4.1.9)
+      activemodel (= 4.2.1)
-      activesupport (= 4.1.9)
+      activesupport (= 4.2.1)
-      arel (~> 5.0.0)
+      arel (~> 6.0)
-    activesupport (4.1.9)
+    activesupport (4.2.1)
-      i18n (~> 0.6, >= 0.6.9)
+      i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.1)
+      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.6)
+    addressable (2.3.8)
-    arel (5.0.1.20140414130214)
+    arel (6.0.0)
     builder (3.2.2)
     capybara (2.4.4)
       mime-types (>= 1.16)
@@ -60,15 +69,13 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    capybara-screenshot (1.0.4)
+    capybara-screenshot (1.0.7)
       capybara (>= 1.0, < 3)
-      colored
       launchy
     celluloid (0.15.2)
       timers (~> 1.1.0)
     cliver (0.3.2)
     coderay (1.1.0)
-    colored (1.2)
     cool.io (1.3.0)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
@@ -99,6 +106,8 @@ GEM
       yajl-ruby (~> 1.0)
     font-awesome-rails (4.3.0.0)
       railties (>= 3.2, < 5.0)
+    globalid (0.3.3)
+      activesupport (>= 4.1.0)
     haml (4.0.6)
       tilt
     haml-rails (0.5.3)
@@ -127,6 +136,8 @@ GEM
       haml
     launchy (2.4.3)
       addressable (~> 2.3)
+    loofah (2.0.1)
+      nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
     mechanize (2.7.3)
@@ -143,13 +154,13 @@ GEM
     mini_portile (0.6.2)
     minitest (5.5.1)
     msgpack (0.5.11)
-    multi_json (1.10.1)
+    multi_json (1.11.0)
     net-http-digest_auth (1.4)
     net-http-persistent (2.9.4)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     ntlm-http (0.1.1)
-    poltergeist (1.5.1)
+    poltergeist (1.6.0)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       multi_json (~> 1.0)
@@ -158,26 +169,35 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-rails (0.3.2)
+    pry-rails (0.3.4)
       pry (>= 0.9.10)
     puma (2.11.1)
       rack (>= 1.1, < 2.0)
-    rack (1.5.2)
+    rack (1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.1.9)
+    rails (4.2.1)
-      actionmailer (= 4.1.9)
+      actionmailer (= 4.2.1)
-      actionpack (= 4.1.9)
+      actionpack (= 4.2.1)
-      actionview (= 4.1.9)
+      actionview (= 4.2.1)
-      activemodel (= 4.1.9)
+      activejob (= 4.2.1)
-      activerecord (= 4.1.9)
+      activemodel (= 4.2.1)
-      activesupport (= 4.1.9)
+      activerecord (= 4.2.1)
+      activesupport (= 4.2.1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.1.9)
+      railties (= 4.2.1)
-      sprockets-rails (~> 2.0)
+      sprockets-rails
-    railties (4.1.9)
+    rails-deprecated_sanitizer (1.0.3)
-      actionpack (= 4.1.9)
+      activesupport (>= 4.2.0.alpha)
-      activesupport (= 4.1.9)
+    rails-dom-testing (1.0.6)
+      activesupport (>= 4.2.0.beta, < 5.0)
+      nokogiri (~> 1.6.0)
+      rails-deprecated_sanitizer (>= 1.0.1)
+    rails-html-sanitizer (1.0.2)
+      loofah (~> 2.0)
+    railties (4.2.1)
+      actionpack (= 4.2.1)
+      activesupport (= 4.2.1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (10.4.2)
@@ -232,7 +252,7 @@ GEM
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (1.4.1)
-    timecop (0.7.1)
+    timecop (0.7.3)
     timers (1.1.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
@@ -245,9 +265,9 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
     webrobots (0.1.1)
-    websocket-driver (0.5.1)
+    websocket-driver (0.5.4)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.1)
+    websocket-extensions (0.1.2)
     xpath (2.0.0)
       nokogiri (~> 1.3)
     yajl-ruby (1.2.1)

fluentd-ui.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "fluentd", [">= 0.10.56", "< 2"]
-  spec.add_dependency 'rails', '~> 4.1.7'
+  spec.add_dependency 'rails', '~> 4.2.0'
   spec.add_dependency 'sucker_punch', "~> 1.0.5"
   spec.add_dependency 'addressable'
   spec.add_dependency "font-awesome-rails"