5 6 1 - Shippable/support GitHub Wiki

Features

1. Allow notifications for canceled runs and builds to be configured separately from failed.
2. Support for Yarn, Selenium 3.4.0 in v5.6.1 image.
3. Ansible CLI support in runSh, runCLI jobs.

Bug Fixes

1. Missing ENV for mysql in newer images.
2. Error when switching node from an unavailable image.
3. Docker images not getting pulled when using cache.