v0.15.0 — Workflow execute command

What's new

Workflow execution from the console

• InMemoryWorkflow::fromArray() builds a Workflow without persisting it.
• New command etl:workflow:execute runs a workflow by code, or from a YAML/JSON file.
• PipelineStatisticMiddleware skips in-memory workflows (nothing to record against).

Dependencies

• symfony/console moves from require-dev to require.
• symfony/yaml is added (used to load YAML workflow files).

Purely additive. See the README for usage.

Full changelog

v0.14.0...v0.15.0