Fixing how exponential retry works so that it will respect user-specified values. Fixing with_retry and decision_context to be module functions to allow their use outside of including AWS::Flow.
Fixing how child workflows fail, making it so that ScheduleActivityTaskFailed raises an exception, and fixing some tests.
Fixing how with_retry gets propagated up, and ensure that fail{workflow,activity} without details/reason doesn't fail the workflow immediately.
Merge branch 'master' of https://github.com/aws/aws-flow-ruby
Bumping version
Adding the graceful shutdown for activity workers feature