CLI is incorrectly parsing volume storage URIs

[dalazx]

Windows 10

tried running the fast.ai command and received the following error:
(base) C:\Users\ybehzadi>neuro login
Logged into https://dev.neu.ro/api/v1

(base) C:\Users\ybehzadi>neuro submit -c 4 -g 1 -m 16G --http 80 --volume storage://~:/var/storage/home:rw --volume storage://neuromation:/var/storage/neuromation:ro image://neuromation/fastai
Using image 'image://neuromation/fastai:latest'

Using volumes:
 'storage:/\yashar' mounted to '/var/storage/home' in rw mode
 'storage:/\neuromation' mounted to '/var/storage/neuromation' in ro mode

ERROR: Illegal argument(s) (Internal Server Error)

cc @astaff
related #634

[shagren]

fixed