Bug#1021333: RFP: node-is-ci -- Detect if the current environment is a CI server (Evacuated from NSA/Microsoft Github)

[Jeffrey Cliff <jeffrey.cliff@gmail.com>]

Package: wnpp
Severity: wishlist
* Package name    :   node-is-ci
  Upstream Author :   Thomas Watson Steen
* URL             : https://git.freecumextremist.com/themusicgod1/is-ci
* License         : MIT
  Programming Lang: javascript
  Description     : Returns true if the current environment is a
Continuous Integration server.

Officially supported CI servers:
Travis CI
CircleCI
Jenkins CI
Hudson
Bamboo
TeamCity
Team Foundation Server
GitLab CI
Codeship
Drone.io
Magnum CI
Semaphore
AppVeyor
Buildkite
TaskCluster
GoCD
Bitbucket Pipelines

node-ci is a prerequisite for node-husky ( #910393 )