[1.13.0](https://github.com/ladybug-tools/queenbee/compare/v1.12.0...v1.13.0) (2020-05-29)
Bug Fixes
* **dag:** add check and warning for empty output artifact paths ([99640ed](https://github.com/ladybug-tools/queenbee/commit/99640ed55378d18c26bf67f9af01a6bae3368d7f))
* **dag:** set `sub_folder` in DAG Task and allow templating ([576a5c5](https://github.com/ladybug-tools/queenbee/commit/576a5c57ea59ee3909b916683282033f4da5c055))
* **inputs:** for `None` I/O to empty dict ([3c15e25](https://github.com/ladybug-tools/queenbee/commit/3c15e25728d1b7caaab8aa3172b9b9d369b2db3d)), closes [#86](https://github.com/ladybug-tools/queenbee/issues/86)
Features
* **loop:** add loop control object ([030ca32](https://github.com/ladybug-tools/queenbee/commit/030ca320fafdfd3b670792752a054c463a08089e)), closes [#87](https://github.com/ladybug-tools/queenbee/issues/87)