v0.15.0

Kotlin

• Introduce Workers as the new and only way to subscribe to external stream and future types. (#289, #321, #322, #323, #324)
• Rename WorkflowContext to RenderContext. (#309)
• Fix for stale workflow output handlers being invoked in later render passes. (#314)
• WorkflowTester improvements:
  • Give WorkflowTester a sendInput method to update the root workflow-under-test's input. (#315)
  • Remove WorkflowTester.with* methods. (#318)
  • Make WorkflowTester the receiver of the lambdas to Workflow.test* methods. (#318)

Swift

• Rename compose to render and update docs. (#301)