Ml-stars

* ``SimpleImputer`` primitive update [Issue17](https://github.com/sintel-dev/ml-stars/issues/17) - by sarahmish

Re-release of previous version

* Adapter for MinMaxScaler [Issue 16](https://github.com/sintel-dev/ml-stars/issues/16) - by sarahmish
* Add python 3.12 [Issue 15](https://github.com/sintel-dev/ml-stars/issues/15) - by sarahmish

* Upgrade python tests & remove python 3.7 [Issue 11](https://github.com/sintel-dev/ml-stars/issues/11) - by sarahmish
* Add deprecation warning for old ARIMA primitive [Issue 10](https://github.com/sintel-dev/ml-stars/issues/10) - by sarahmish
* Remove python 3.6 [Issue 9](https://github.com/sintel-dev/ml-stars/issues/9) - by sarahmish
* Add support for python 3.10 & 3.11 [Issue 8](https://github.com/sintel-dev/ml-stars/issues/8) - by sarahmish

* Update ``keras`` adapter [Issue 7](https://github.com/sintel-dev/ml-stars/issues/7) - by sarahmish

* Add python 3.9 [Issue 6](https://github.com/sintel-dev/ml-stars/issues/6) - by sarahmish