chore: release 6.8.1 (#1183)

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CHANGELOG.md

@@ -1,5 +1,26 @@
 # Changelog
 
+### [6.8.1](https://www.github.com/snakemake/snakemake/compare/v6.8.0...v6.8.1) (2021-09-24)
+
+
+### Bug Fixes
+
+* async_run to allow nested event loops. ([#1170](https://www.github.com/snakemake/snakemake/issues/1170)) ([5dc6bbd](https://www.github.com/snakemake/snakemake/commit/5dc6bbd440ac46e81a926b6749969b98b7e33a9f))
+* merging of pipe groups when multiple rules are chained together via pipes ([#1173](https://www.github.com/snakemake/snakemake/issues/1173)) ([de91d2c](https://www.github.com/snakemake/snakemake/commit/de91d2ccf53bd844b4dbf4f64dd087f4ee935be5))
+* potential memory corruption caused by Google storage objects accessed from different threads ([#1174](https://www.github.com/snakemake/snakemake/issues/1174)) ([41a5071](https://www.github.com/snakemake/snakemake/commit/41a5071b750dca5d7fceec324d81d9a93c86bdb6))
+
+
+### Performance Improvements
+
+* more extensive caching of source files, including wrappers. ([#1182](https://www.github.com/snakemake/snakemake/issues/1182)) ([bdb75f8](https://www.github.com/snakemake/snakemake/commit/bdb75f828a3ae27ba97ea6cd5e71a34ac7b27eea))
+
+
+### Documentation
+
+* move note ([75a544b](https://www.github.com/snakemake/snakemake/commit/75a544ba528b30b43b861abc0ad464db4d6ae16f))
+* polish ([47a7b62](https://www.github.com/snakemake/snakemake/commit/47a7b628686258a28dd870f20bf1f121b3a881c3))
+* tutorial formatting ([594f5fb](https://www.github.com/snakemake/snakemake/commit/594f5fbb342e0722318641dea07d7da4c5eb8116))
+
 ## [6.8.0](https://www.github.com/snakemake/snakemake/compare/v6.7.0...v6.8.0) (2021-09-06)