add upstream dev matrix to tests
ADD
ci/upstream-dev.yml
+name: pangeo-forge-recipes
+channels:
+ - conda-forge
+dependencies:
+ - pip:
+ - "git+https://github.com/dask/dask.git"
+ - "git+https://github.com/fsspec/filesystem_spec.git"
+ - "git+https://github.com/pydata/xarray.git"

add upstream dev matrix to tests