Features:

• Allow Reactors to be able to be undone after successful completion. (#262) by James Harton

• add allow_async? flag to compose DSL (#256) by James Harton

Bug Fixes:

• undo for composed reactors (#263) by James Harton

• resolve nested step dependency and argument inheritance issues (#258) by James Harton

• correct current_try increment during step retries (#257) by James Harton

• correct current_try increment during step retries by James Harton

• mermaid: trim whitespace from module names to prevent :nofile errors (#253) by James Harton