v0.7.0-beta1

What's Changed

• Add Version to Workflow Specification by @mfleader in #112

A workflow file is now required to provide the workflow schema version that the workflow is using.

Currently, the only valid and supported workflow version is v0.1.0..
Workflow versions must contain the major, minor, and patch version, and be prepended with a 'v'.

For example
workflow.yaml

version: v0.1.0
input: []
steps: []
outputs: []

Full Changelog: v0.6.1...v0.7.0-beta1