Environment variables exposed by CI tools

  Supports travis, circle, gitlab, wercker, drone, codeship, now(zeit), netlify, GitHub Actions, Buddy, Codefresh and Cloudflare Pages. Kinda supports custom CI as well. [Specs here](https://github.com/siddharthkp/ci-env/blob/master/index.js#L68-L79)   #### Installation ``` npm install ci-env ```   #### Usage ```js const { repo, sha, event, commit_message, pull_request_number, branch, ci } = require('ci-env') ```   #### like it? ⭐️ this repo   #### License MIT © siddharthkp