Add Benjie and @oneof RFC to May agenda (graphql#950)

agendas/2022/2022-05-05.md

@@ -101,6 +101,7 @@ This is an open meeting in which anyone in the GraphQL community may attend.
 | Yaacov Rydzinski | @yaacovcr | Individual | Neve Daniel, IL
 | Roman Ivantsov | @rivantsov | Microsoft | Seattle, WA
 | Rob Richard | @robrichard | 1stDibs | New York, NY, US
+| Benjie Gillam ✏️ | @benjie | Graphile | Chandler's Ford, UK
 
 ## Agenda
 
@@ -122,10 +123,17 @@ This is an open meeting in which anyone in the GraphQL community may attend.
  - graphql-js PR: https://github.com/graphql/graphql-js/pull/3550
  - discussion: https://github.com/graphql/graphql-wg/discussions/944
 1. Defer/Stream
- - asynchronous iterators of iterables versus of items, continuation of last WG meeting (15 min, Yaacov)
+ - asynchronous iterators of iterables versus of items, continuation of last WG meeting (15m, Yaacov)
  - Should resolvers returning AsyncIterables returning AsyncIterables of items or AsyncIterables of Iterables of items? 
  - Should the AsyncGenerator returned by graphql-js yield items singly or yield all available items (in array or otherwise)? 
  - Background: https://github.com/robrichard/defer-stream-wg/discussions/38
  - See above link for polls, still waiting for feedback explaining votes.
  - Stream Payload index format (10m, Rob)
  - https://github.com/robrichard/defer-stream-wg/discussions/39
+1. `@oneof` - time to promote to RFC2? (20m, Benjie)
+ - [Spec PR](https://github.com/graphql/graphql-spec/pull/825)
+ - [graphql.js PR](https://github.com/graphql/graphql-js/pull/3513) (thanks @erikkessler1)
+ - Main hesitation: should we mirror `@oneof` in the output types (i.e. `type Foo @oneof { ... }`)
+ - If yes: what does this mean for unions?
+ - If yes: should we spec this a little before merging the input-only `@oneof`?
+ - If no: is it desirable that input polymorphism and output polymorphism is so different?