**Version of CHAOS:** CHAOS-7.12 (0712)
Features
---------
* Updated RC-index file to RC_1997-2022_Sept_v3.dat.
* Improved time conversion paragraph in the usage section.
* Added option to `chaosmagpy.coordinate_utils.sh_analysis` to increase
the grid size for the numerical integration.
* Made time conversion functions (`chaosmagpy.data_utils.mjd2000`, `chaosmagpy.data_utils.timestamp`, `chaosmagpy.data_utils.dyear_to_mjd`, `chaosmagpy.data_utils.mjd_to_dyear`) directly available upon import.
* Extended `chaosmagpy.model_utils.power_spectrum` to accept NumPy style
``axis`` keyword argument, and added new tests for this function.
* Added more detailed error message when requesting near-magnetospheric
coefficients outside the domain covered by the RC-index file.
* Added input parameters ``rc_e`` and ``rc_i`` to the model call method.