Lets you check whether you are running in a continuous integration server
 and fetches the name of the CI service.
 .
 Supported CI:
 Travis CI, CircleCI, Jenkins CI, Hudson,
 Bamboo by Atlassian, TeamCity by JetBrains,
 Team Foundation Server by Microsoft,
 GitLab CI, Codeship, Drone, Magnum CI,
 Semaphore, AppVeyor, Buildkite,
 TaskCluster, GoCD, Bitbucket Pipelines
 .
 Includes also small modules:
  - is-ci testing if you run under CI
  - is-interactive testing if you have access to interactive terminal
  - is-unicode-supported: detect whether the terminal supports Unicode
 .
 Node.js is an event-based server-side JavaScript engine.