cross-ci/lib/var/TIME.js

`cross-ci` standardizes environment variables for CI. For example, your can simply use `BUILD_BRANCH` variable in all CI runners instead of `CIRCLE_BRANCH` in CircleCI or `TRAVIS_PULL_REQUEST_BRANCH` in Travis.

/// Current time in UTC format.
const TIME = () => (new Date()).toUTCString();

module.exports = TIME;