New Primitives
* Add primitive `sklearn.naive_bayes.GaussianNB` - [Issue 242](https://github.com/MLBazaar/MLPrimitives/issues/242) by sarahmish
* Add primitive `sklearn.linear_model.SGDClassifier` - [Issue 241](https://github.com/MLBazaar/MLPrimitives/issues/241) by sarahmish
Primitive Improvements
* Add offset to rolling_window_sequence primitive - [Issue 251](https://github.com/MLBazaar/MLPrimitives/issues/251) by skyeeiskowitz
* Rename the time_index column to time - [Issue 252](https://github.com/MLBazaar/MLPrimitives/issues/252) by pvk-developer
* Update featuretools dependency - [Issue 250](https://github.com/MLBazaar/MLPrimitives/issues/250) by pvk-developer
General Improvements
* Udpate dependencies and add python3.8 - [Issue 246](https://github.com/MLBazaar/MLPrimitives/issues/246) by csala
* Drop Python35 - [Issue 244](https://github.com/MLBazaar/MLPrimitives/issues/244) by csala