Rdtools

Adds support for Pandas 2.0 (see https://github.com/NREL/rdtools/pull/362)

This patch includes two bug fixes:
- Fixes an error from degradation_year_on_year() for datasets that are exactly 2 years long
- soiling_interval_plot() no longer ignores some optional parameters.

For full details see the [change log](https://rdtools.readthedocs.io/en/stable/changelog.html#)

What's Changed
* Drop python 3.6
* Add python 3.10
* Fixed a plotting issue in `plotting.availability_summary_plots()` with newer matplotlib versions, as well as an axis labeling error
* [Full Change log](https://rdtools.readthedocs.io/en/stable/changelog.html)


**All Changes**: https://github.com/NREL/rdtools/compare/2.1.2...2.1.3

What's Changed
* Change XGBoost model to version-stable json
* Change recommended citation
* For details see the [change log](https://rdtools.readthedocs.io/en/stable/changelog.html#)


**All Changes**: https://github.com/NREL/rdtools/compare/2.1.1...2.1.2

This patch release temporarily requires xgboost < 1.5.0. A future update will allow a wider version range. (301, 297 )

This update includes changes to the experimental soiling functions, as well as a host of added functionality including the full release of an object oriented end-to-end analysis API and new algorithms for clipping detection and filtering. See the [changelog](https://rdtools.readthedocs.io/en/stable/changelog.html) for full details.