Re-enable skipping CI build for 2.0 as supported in 1.0 with [skip ci]
Circle 1.0 supported skipping builds from commit messages:
We would like the same functionality for 2.0. There are times when you are just updating docs or other files that don't actually affect tests and don't want to wait for a build to complete (especially if you have GitHub setup to not let you merge until the build is complete).
Mar 9, 2018