UpdateGroupingPolicy() and UpdateNamedGroupingPolicy() API for node-casbin

[ankitaShrma]

There is updatePolicy(), but I don't see any update APIs for roles and other grouping policies in node version. Is this going to be implemented?
https://casbin.org/docs/en/management-api#updatenamedgroupingpolicy

[casbin-bot]

@Zxilly @Gabriel-403

[hsluoyz]

@MRGUOKING plz fix labeling:

[Shivansh-yadav13]

@hsluoyz can I work on this?

[Zxilly]

@Shivansh-yadav13 You can feel free to make PR

[hsluoyz]

@Shivansh-yadav13 plz work on: #332 (I ATed you actually)

[Shivansh-yadav13]

removing my previous issue so that we have one place to track them

• UpdateGroupingPolicy
• UpdateNamedGroupingPolicy
• GetImplicitResourcesForUser

[Hanaffi]

@hsluoyz @nodece Can you please assign this to me?

[Shivansh-yadav13]

@Hanaffi are you up for adding these?

[hsluoyz]

@Shivansh-yadav13 you can do it