Today we have a few CI builds that test that certain subsets of dask work with their minimum dependencies installed. For example, dask.array tests all pass when core minimum dependecies and numpy=1.21 are installed. However, we don't currently have coverage for all the other optional dependencies that dask supports. For example, we don't test that dask.array tests pass when minimum versions of other optional dependencies like zarr, scipy, etc. are installed. It'd be nice if we has a CI build that covered these cases.