xarray: add upper pin for datatree compatibility

ci/install-upstream-wheels.sh

@@ -12,8 +12,8 @@ conda uninstall -y --force \
   regionmask \
   scikit-learn \
   scipy \
-  statsmodels \
-  xarray
+  statsmodels
+  # xarray # re-add after removing upper pin for xarray-datatree
 
 # keep cartopy & matplotlib: we don't have tests that use them
 # keep joblib: we want to move away from pickle files
@@ -39,8 +39,8 @@ python -m pip install \
     git+https://github.com/fatiando/pooch \
     git+https://github.com/geopandas/geopandas \
     git+https://github.com/properscoring/properscoring \
-    git+https://github.com/pydata/xarray \
     git+https://github.com/pypa/packaging \
     git+https://github.com/pyproj4/pyproj \
     git+https://github.com/regionmask/regionmask \
     git+https://github.com/SciTools/nc-time-axis
+    # git+https://github.com/pydata/xarray \

environment.yml

@@ -21,7 +21,7 @@ dependencies:
  - scikit-learn
  - scipy
  - statsmodels>=0.13
- - xarray>=2023.04 # because pandas 2 is required
+ - xarray>=2023.04, <2024.10 # upper pin for xarray-datatree
  - xarray-datatree
 # for testing
  - black!=23

setup.cfg

@@ -45,7 +45,7 @@ install_requires =
     scikit-learn >=1.3 # only for the tests
     scipy >=1.11
     statsmodels >=0.14
-    xarray >=2023.07
+    xarray >=2023.07, < 2024.10 # upper pin for xarray-datatree
     xarray-datatree >=0.0.13
 
 [options.extras_require]