Pipemake

What's Changed
* Add rRNA filter, update SRA modules by aewebb80 in https://github.com/kocherlab/pipemake/pull/22


**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.2.1...v1.2.2

What's Changed
* downgrade SLEAP to v1.2.8 by aewebb80 in https://github.com/kocherlab/pipemake/pull/19
* Update pipemake to allow different shell types using shell_exec by aewebb80 in https://github.com/kocherlab/pipemake/pull/20
* remove non-output by aewebb80 in https://github.com/kocherlab/pipemake/pull/21


**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.2.0...v1.2.1

**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.1.6...v1.2.0

**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.1.5...v1.1.6

**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.1.4...v1.1.5

**Full Changelog**: https://github.com/kocherlab/pipemake/compare/v1.1.1...v1.1.2