Update dask and distributed version

[jrbourbeau]

This updates to a more recent version of dask / distributed to avoid errors like

 ---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Input In [1], in <cell line: 1>()
----> 1 from distributed import Client
      2 import dask_ml.datasets
      3 import dask_ml.ensemble

File /usr/share/miniconda3/envs/dask-examples/lib/python3.8/site-packages/distributed/__init__.py:3, in <module>
      1 from . import config
      2 from dask.config import config
----> 3 from .actor import Actor, ActorFuture
      4 from .core import connect, rpc
      5 from .deploy import LocalCluster, Adaptive, SpecCluster, SSHCluster

File /usr/share/miniconda3/envs/dask-examples/lib/python3.8/site-packages/distributed/actor.py:6, in <module>
      3 import threading
      4 from queue import Queue
----> 6 from .client import Future, default_client
      7 from .protocol import to_serialize
      8 from .utils import sync

File /usr/share/miniconda3/envs/dask-examples/lib/python3.8/site-packages/distributed/client.py:31, in <module>
     29 from dask.core import flatten, get_dependencies
     30 from dask.optimization import SubgraphCallable
---> 31 from dask.compatibility import apply
     32 from dask.utils import ensure_dict, format_bytes, funcname
     34 from tlz import first, groupby, merge, valmap, keymap, partition_all

ImportError: cannot import name 'apply' from 'dask.compatibility' (/usr/share/miniconda3/envs/dask-examples/lib/python3.8/site-packages/dask/compatibility.py)
ImportError: cannot import name 'apply' from 'dask.compatibility' (/usr/share/miniconda3/envs/dask-examples/lib/python3.8/site-packages/dask/compatibility.py)

which are showing up in CI

[jrbourbeau]

Closing in favor of #218