language: ruby
rvm:
  - "1.9"
  - "2.0"
  - "2.1"
  - "2.2"
  - "jruby-19mode"
before_script:
  - git submodule update --init
  - bundle install
  - bundle update
script:
  - make

language: ruby
rvm:
  - "1.9"
  - "2.0"
  - "2.1"
  - "2.2"
  - "jruby-19mode"
before_script:
  - git submodule update --init
  - gem update bundler
  - bundle install
  - bundle update
script:
  - make

Update bundler to fix installation issue
Update bundler to fix installation issue

ref: https://github.com/bundler/bundler/pull/3559
