language: ruby
sudo: false
cache: bundler
rvm:
  - 2.1.10
  - 2.2.7
  - 2.3.4
  - 2.4.1
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head

language: ruby
sudo: false
cache: bundler
rvm:
  - 2.1.10
  - 2.2.8
  - 2.3.5
  - 2.4.2
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head

Update Ruby teeny versions that are used in Travis CI. 2.4.2, 2.3.5 and 2.2.8
Update Ruby teeny versions that are used in Travis CI. 2.4.2, 2.3.5 and 2.2.8
