Update selenium-webdriver to version 2.42.0

Gemfile.lock

@@ -38,7 +38,7 @@ GEM
     capybara-webkit (1.0.0)
       capybara (~> 2.0, >= 2.0.2)
       json
-    childprocess (0.3.9)
+    childprocess (0.5.3)
       ffi (~> 1.0, >= 1.0.11)
     chunky_png (1.2.9)
     coffee-rails (4.0.1)
@@ -96,7 +96,7 @@ GEM
     mime-types (1.25.1)
     mini_portile (0.5.2)
     minitest (4.7.5)
-    multi_json (1.8.4)
+    multi_json (1.10.1)
     mysql2 (0.3.14)
     nokogiri (1.6.0)
       mini_portile (~> 0.5.0)
@@ -145,16 +145,16 @@ GEM
       rspec-core (~> 2.14.0)
       rspec-expectations (~> 2.14.0)
       rspec-mocks (~> 2.14.0)
-    rubyzip (1.0.0)
+    rubyzip (1.1.4)
     sass (3.2.12)
     sass-rails (4.0.1)
       railties (>= 4.0.0, < 5.0)
       sass (>= 3.1.10)
       sprockets-rails (~> 2.0.0)
-    selenium-webdriver (2.37.0)
-      childprocess (>= 0.2.5)
+    selenium-webdriver (2.42.0)
+      childprocess (>= 0.5.0)
       multi_json (~> 1.0)
-      rubyzip (~> 1.0.0)
+      rubyzip (~> 1.0)
       websocket (~> 1.0.4)
     sprockets (2.10.1)
       hike (~> 1.2)