Change astropy packages to astropy-base

Author: Mark Wieczorek

docs/pages/mydoc/python-installing.md

@@ -86,7 +86,7 @@ When installing pyshtools using `pip` or `conda`, the following packages should
 * [setuptools_scm](https://setuptools-scm.readthedocs.io/en/latest/): required to obtain the pyshtools version number.
 * [scipy](https://www.scipy.org/): required for a few specialized functions.
 * [matplotlib](https://matplotlib.org/): required for most plotting functions.
-* [astropy](https://www.astropy.org/): required for the constants module.
+* [astropy-base](https://www.astropy.org/): required for the constants module.
 * [xarray](https://xarray.pydata.org/en/stable/#): required for netcdf file support.
 * [requests](https://2.python-requests.org/en/master/#): required when reading files from urls.
 * [pooch](https://www.fatiando.org/pooch/latest/index.html): required for reading datasets.

environment.yml

@@ -9,7 +9,7 @@ dependencies:
     - numpy>=1.23.5
     - scipy>=0.14.0
     - matplotlib-base>=3.3
-    - astropy>=4.0
+    - astropy-base>=4.0
     - xarray
     - requests
     - pooch>=1.1

requirements.txt

@@ -3,7 +3,7 @@ setuptools-scm>=8
 numpy>=1.23.5
 scipy>=0.14.0
 matplotlib>=3.3
-astropy>=4.0
+astropy-base>=4.0
 xarray
 requests
 pooch>=1.1