v2.2.1

What's Changed

• Check the data_type of returned chunk of plugin by @dachengx in #995
• Topological level and shortest dependency path of dependency tree (directed acyclic graph) by @dachengx in #996
• Do not assign _multi_output_topics when the topic is from a loader by @dachengx in #997

Full Changelog: v2.2.0...v2.2.1