Fix import of infer_storage_options

[rafa-guedes]

intake is trying to import infer_storage_options from dask.bytes.utils but it sits in dask.bytes.core in master version of dask. This should fix:

In [1]: import intake                                                                                                                   
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-6ae586f3fa7a> in <module>
----> 1 import intake, intake_xarray

~/Envs/py3/lib/python3.7/site-packages/intake/__init__.py in <module>
     14 del get_versions
     15 from . import source
---> 16 from .source.base import Schema, DataSource
     17 from .catalog.base import Catalog, RemoteCatalog
     18 from .catalog import local

~/Envs/py3/lib/python3.7/site-packages/intake/source/base.py in <module>
      9 '''
     10 
---> 11 from .cache import make_caches
     12 from ..utils import make_path_posix, DictSerialiseMixin
     13 import sys

~/Envs/py3/lib/python3.7/site-packages/intake/source/cache.py in <module>
     18 import warnings
     19 
---> 20 from dask.bytes.utils import infer_storage_options
     21 from intake.config import conf
     22 from intake.utils import make_path_posix

ImportError: cannot import name 'infer_storage_options' from 'dask.bytes.utils' (/source/dask/dask/bytes/utils.py)

[martindurant]

I believe this is fixed in #381 - can you check?

[rafa-guedes]

Yep this is fixed there.. I came up with a few other missing paths though, will maybe open a pull request on your fork.

[martindurant]

Please do