updated rails to 4.2.4

db/migrate/20150929142405_change_postalcode_format_in_venues.rb

@@ -0,0 +1,9 @@
+class ChangePostalcodeFormatInVenues < ActiveRecord::Migration
+  def up
+    change_column :venues, :postalcode, :string
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration.new('Cannot reverse migration.')
+  end
+end