bad documentation for 'checkMultiple'

[chris-praxis]

The documentation for 'checkMultiple' says "Accepts an array of permission types", but this broke for me and I needed to provide an object, not an array.

[farfromrefug]

@chris-praxis sorry about that. The typescript typings are always good and the related document is here https://nativescript-community.github.io/perms/.
PR are welcome though if you find something that needs fixing