[REVIEW] Add backward compatibility for dask-cudf to work with other versions of dask

[galipremsagar]

The current dask-cudf includes latest changes that work with latest dask changes. But when an existing release version of dask is used with dask-cudf it will fail to import some of the dispatches needed for make_meta & make_meta_util.. This PR will handle those import errors and have a fallback in place.

[kkraus14]

@galipremsagar can you bump the allowed dask package in the conda recipes / setup.py / requirements.txt files?

[jakirkham]

Ah I have those changes in PR ( #8363 )

[kkraus14]

Ah I have those changes in PR ( #8363 )

I think that just bumps the required version whereas this PR allows the older version to continue working. Going to close it in favor of this PR.

[kkraus14]

I think this needs to be updated as well: https://github.com/rapidsai/cudf/blob/branch-21.06/conda/recipes/custreamz/meta.yaml#L34-L35

[kkraus14]

@gpucibot merge

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[jakirkham]

Thanks all! 😄