Add more dependencies to unstable CI

Try to make xarray happy

.github/workflows/ci.yaml

@@ -58,6 +58,8 @@ jobs:
           git+https://github.com/Unidata/cftime \
           git+https://github.com/mapbox/rasterio \
           git+https://github.com/pydata/bottleneck \
+          git+https://github.com/h5py/h5py \
+          git+https://github.com/h5netcdf/h5netcdf \
           git+https://github.com/zarr-developers/zarr \
           git+https://github.com/pydata/xarray;
           python -m pip install -e . --no-deps --no-build-isolation;
@@ -73,7 +75,6 @@ jobs:
       - name: Run unit tests
         shell: bash -l {0}
         run: |
-          python -c "from xarray.backends.api import open_dataset"
           pytest --cov=trollimage trollimage/tests --cov-report=xml --cov-report=
 
       - name: Upload unittest coverage to Codecov