version: 2
jobs:
  build:
    docker:
      - image: circleci/ruby:2.4.1-jessie
    steps:
      - checkout
      - run: bundle install
      - run: bundle exec rspec spec

version: 2
jobs:
  build-2.4.4:
    docker:
      - image: circleci/ruby:2.4.4-jessie
    steps:
      - checkout
      - run: bundle install
      - run: bundle exec rspec spec

Test on newest 2.4 version
Test on newest 2.4 version
