Rdtools

This patch changes the CODS algorithm to return results without bootstrapping when soiling signal is small but raise warning. It also makes several bug fixes. For details, please see the [change log](https://rdtools.readthedocs.io/en/latest/changelog.html)

Adds a framework for applying filters to aggregated data in `TrendAnalysis`. For full details see the [change log](https://rdtools.readthedocs.io/en/latest/changelog.html).

This release includes several new enhancements:

- Detailed degradation summary plot
- Degradation time series plot for assessing non-linear degradation
- The Combined estimation OF Degradation and Soiling (CODS) algorithm implemented in the soiling module.

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

This patch addresses a bug in parallel computing environments (see 388 and 399)

- Limit allowed versions of pandas <2.1 to avoid a bug
- Update versions of indirect dependencies in `requirements.txt` and `notebook_requirements.txt`

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

- Fix NonExistentTimeError in rdtools.clearsky_temperature.get_clearsky_tamb()
- rdtools.degradation.degradation_classical_decomposition() now executes significantly faster
- Increased the minimum versions of several dependencies
- pandas increased to 1.3.0 (released July 2, 2021)
- numpy to 1.17.3 (released October 17, 2019)
- statsmodels to 0.11.0 (released February 21, 2020)
- scipy to 1.2.0 (released December 17, 2018)

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