Passing url parameter on windows breaks

[Harm Meijer]

• cross-env version: 5.2.0
• node 8.16.2:
• npm version: 6.4.1

Following script in package.json :

"op": "cross-env \"echo \"https://hello.world\"\"",

On mac it outputs: https://hello.world and on windows it outputs https:\hello.world

I am unable to pass urls as parameters in package.json script because cross-env and cross-env-shell will destroy them on windows.

[Kent C. Dodds]

#257