Hep-ml

What's Changed
* Document_norm by goi42 in https://github.com/arogozhnikov/hep_ml/pull/85
* Fix probability calculation for uBoostClassifier by ehhov in https://github.com/arogozhnikov/hep_ml/pull/88

New Contributors
* goi42 made their first contribution in https://github.com/arogozhnikov/hep_ml/pull/85
* ehhov made their first contribution in https://github.com/arogozhnikov/hep_ml/pull/88

**Full Changelog**: https://github.com/arogozhnikov/hep_ml/compare/v0.7.2...v0.7.3

What's Changed
* Upgrade sklearn criterion mse to squared_error by jonas-eschle in https://github.com/arogozhnikov/hep_ml/pull/71
* Resolve conflicts between numpy 1.22 and theano, stop testing python 2.7 by arogozhnikov in https://github.com/arogozhnikov/hep_ml/pull/72
* replace np.float with float, fix deprecation warning by ahill187 in https://github.com/arogozhnikov/hep_ml/pull/75
* replace deprecated numpy aliases with python builtins by richard-lane in https://github.com/arogozhnikov/hep_ml/pull/78
* remove theano from testing, as theano can't work with current numpy (… by arogozhnikov in https://github.com/arogozhnikov/hep_ml/pull/79
* Fix creation of releases from pypi by arogozhnikov in https://github.com/arogozhnikov/hep_ml/pull/80
* bump version by arogozhnikov in https://github.com/arogozhnikov/hep_ml/pull/81

New Contributors
* ahill187 made their first contribution in https://github.com/arogozhnikov/hep_ml/pull/75
* richard-lane made their first contribution in https://github.com/arogozhnikov/hep_ml/pull/78

**Full Changelog**: https://github.com/arogozhnikov/hep_ml/compare/v0.7.0...v0.7.2

- fixed weight normalization (jonas-eschle)
- moved travis ci -> github actions
- auto-deployment of new releases to pypi
- documentation was moved to <master branch>/docs and served from there

- updated jupyter examples
- some minor fixes to adapt to updates in dependencies (numpy, sklearn, theano)
- updated CI scripts
- minor improcements in the documentation