language: ruby
sudo: false
cache: bundler
rvm:
  - 2.0.0
  - 2.1
  - 2.2
env:
  matrix:
    - SPROCKETS_VERSION="~> 3.7.0"
    - SPROCKETS_VERSION="~> 4.0.0.beta.4"

language: ruby
sudo: false
cache: bundler
rvm:
  - 2.2.7
  - 2.3.4
  - 2.4.1
env:
  matrix:
    - SPROCKETS_VERSION="~> 3.7.0"
    - SPROCKETS_VERSION="~> 4.0.0.beta.4"

Update Ruby versions on Travis CI
Update Ruby versions on Travis CI
