v0.21.0

Added

• Support Task Flow and enhance dynamic task mapping by @tatiana in #314. Examples illustrated here and here
• Render YML DAG config as DAG Docs by @pankajastro #305
• Support building DAGs from topologically unsorted YAML files by @tatiana in #307
• Add support for nested task groups by @glazunov996 and @pankajastro in #292
• Add support for templating on_failure_callback by @jroach-astronomer #252

Fixed

• Fix compatibility with apache-airflow-providers-cncf-kubernetes>=10.0.0 by @tatiana in #311
• Refactor telemetry to collect events during DAG run and not during DAG parsing by @pankajastro #300

Docs

• Fix reference for HttpSensor in README.md by @pankajastro in #277
• Add example DAG for task group by @pankajastro in #293
• Add CODEOWNERS by @pankajkoti in #270
• Update CODEOWNERS to track all files by @pankajkoti in #276
• Modified Status badge in README by @jaejun #298

Others

• Add GitHub issue template for bug reports and feature requests by @pankajkoti in #269
• Refactor dynamic task mapping implementation by @tatiana in #313
• Remove PyTest durations from tests by @tatiana in #309
• Remove DAG retries check since many DAGs have different retry values by @tatiana in #310
• Lint fixes after running pre-commit run --all-files by @tatiana in #312
• Remove redundant exception code by @pankajastro #294