ListGrantsQueryParams typed incorrectly

[johnjiang]

Describe the bug
The types in ListGrantsQueryParams are camelCased but it should be underscore

To Reproduce
Try fetching grants.list with:

orderBy: 'desc'
sortBy: 'updatedAt`

and you'll get an error

Expected behavior
The types to be consistent with the api docs

SDK Version:
Tested on 7.11 but also affects later versions

Additional context
Add any other context about the problem here.

[AaronDDM]

Thank you. Got a PR up.