sudo: false
language: ruby
rvm:
  - 2.5.0
  - 2.4.3
  - 2.3.6
  - 2.2.9
  - 2.1.10
addons:
  apt:
    config:
      retries: true
    packages:
      - imagemagick
      - libmagickcore-dev
      - libmagickwand-dev
      - graphicsmagick