update travis

Gemfile

@@ -1,12 +1,10 @@
 source 'https://gems.ruby-china.org'
 
-
-gem 'bootstrap-sass','~> 3.3.7'
+gem 'bootstrap-sass', '~> 3.3.7'
 # Use ActiveModel has_secure_password
-gem 'bcrypt','~> 3.1.11'
-
-gem 'faker','~> 1.6.3'
-gem 'rails_admin','~> 0.8.1'
+gem 'bcrypt', '~> 3.1.11'
+gem 'faker', '~> 1.6.3'
+gem 'rails_admin', '~> 0.8.1'
 
 # gem 'carrierwave'
 # gem 'paperclip'
@@ -39,7 +37,8 @@ gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0', group: :doc
 
-gem 'pg'
+# for postgresql
+gem 'pg', '~> 0.18.4'
 
 # gem 'bcrypt', '~> 3.1.7'
 

Gemfile.lock

@@ -195,7 +195,7 @@ DEPENDENCIES
   faker (~> 1.6.3)
   jbuilder (~> 2.0)
   jquery-rails
-  pg
+  pg (~> 0.18.4)
   rails (= 4.2.5.2)
   rails_12factor
   rails_admin (~> 0.8.1)