FIX-#460: downgrade sh version requirement, minor release version bump

Signed-off-by: Doris Lee <dorisjunglinlee@gmail.com>

FIX-#443: Bump version for v0.5.0 release

Signed-off-by: Doris Lee <dorisjunglinlee@gmail.com>

bump version

bump version

KeyError bugfix for matplotlib bar chart (#391)

* matplotlib bar chart bugfix

* test fix

bump version

version bump

update README

bump version and requirement

PATCH v0.2.1.1

* remove __future__ annotations dependency
* remove channel inheritance in Enhance
* bugfix 3-clause Vis example in 5-datetime.ipynb
* update README