fix black, upgrade version (hyperopt#827)

* fix black, upgrade version

* add pyj4 dep

* build and test

* formatting readme

* only run non-spark and non-mongo tests on github actions for now

bump version

bump version to 0.2.4

v0.2.2

v0.2.1

release 0.2

Update setup.py

bump version (hyperopt#419)

Merge pull request hyperopt#272 from hyperopt/py3

Python 3 compatibility