fix(group): add "banned" to GroupMembershipStatus

[ttshivers]

Add "banned" to GroupMembershipStatus. This shows up on /groups/{groupId}/bans.

[ariesclark]

Hi, we appropriate your contributions!

We also have a testing repository that should be keeping track of changes in the API, if you'd like, you could take a look. For example: here is the getUser response, with a few undocumented properties marked out. The repository itself has a lot of missing coverage, like groups not having any tests at all.

[ttshivers]

Hi, we appropriate your contributions!

We also have a testing repository that should be keeping track of changes in the API, if you'd like, you could take a look. For example: here is the getUser response, with a few undocumented properties marked out. The repository itself has a lot of missing coverage, like groups not having any tests at all.

Here is an attempt at a basic test to start vrchatapi/specification-test#3