Support lists in query variables (Dgraph's GraphQL Variable)

Issues Dgraph
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16

vancouverwill commented :

This works

query query($uids: string = "[0x1, 0x2, 0x3]") {
  query(func: uid($uids)) {
    uid
  }
}

so, what needs to change, and not confuse future users, is the uid part. I gonna add references about this there.

that’s a nice interim solution but the client shouldn’t have to convert a list of uids to strings and concatenate, we should be able to have an input of type [string] or [uid]