Hipe4ml-converter

- Bump onnx versions and fix hummingbird version to 0.4.9
- Bump hipe4ml version to 0.0.15
- Add support for python3.10

- Bump onnx versions and fix hummingbird version to 0.4.9
- Bump hipe4ml version to 0.0.15
- Add support for python3.10

What's Changed
* Bump onnx versions and fix hummingbird version to `0.4.2`
* Add documentation

**Full Changelog**: https://github.com/hipe4ml/hipe4ml_converter/compare/v0.0.3...v0.0.4

What's Changed
* Update version for new release by mconcas in https://github.com/hipe4ml/hipe4ml_converter/pull/15
* Update pythonpublish.yml by mconcas in https://github.com/hipe4ml/hipe4ml_converter/pull/14


**Full Changelog**: https://github.com/hipe4ml/hipe4ml_converter/compare/v0.0.2...v0.0.3

What's Changed
* Add badge back by mconcas in https://github.com/hipe4ml/hipe4ml_converter/pull/11
* Add report badge for publishing test by mconcas in https://github.com/hipe4ml/hipe4ml_converter/pull/13
* Bump version and fix repo name in README by fgrosa in https://github.com/hipe4ml/hipe4ml_converter/pull/12


**Full Changelog**: https://github.com/hipe4ml/hipe4ml_converter/compare/v0.0.1...v0.0.2

This version introduces:
- The `H4MLConverter` class that converts BDT models wrapped into hipe4ml `ModelHandler` objects to ONNX and tensor formats using the hummingbird library
- The tests of all the conversion functions