Put this in a `.circleci` directory

config.yml

experimental:
  notify:
    branches:
      only:
        - master

version: 2
jobs:
  php7.1-5.5:
    docker:
      - image: circleci/php:7.1
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit

  php7.1-5.6:
    docker:
      - image: circleci/php:7.1
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit

  php7.1-5.7:
    docker:
      - image: circleci/php:7.1
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit

  php7.2-5.5:
    docker:
      - image: circleci/php:7.2
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit

  php7.2-5.6:
    docker:
      - image: circleci/php:7.2
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit

  php7.2-5.7:
    docker:
      - image: circleci/php:7.2
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: Update binaries
          command: |
            sudo apt-get update
            sudo apt-get install -y ghostscript
            sudo docker-php-ext-install imagick
      - run: composer update --prefer-source
      - run: composer require league/flysystem-aws-s3-v3 #require laravel specific versions here
      - run: vendor/bin/phpunit