Add @defer/@stream arguments and payload to agenda (#406)

* Add @defer/@stream arguments and payload to agenda

* Update 2020-05-07.md

Co-authored-by: Lee Byron <[email protected]>

Author: robrichard

agendas/2020-05-07.md

@@ -37,6 +37,8 @@ agenda, edit this file.*
 | Stephen Spalding         | Netflix                  | Los Gatos, CA
 | Evan Huus                | Shopify                  | Ottawa, ON, CA
 | Andrew Sprouse           | TakeShape                | Brooklyn, NY
+| Rob Richard              | 1stdibs                  | New York, NY
+| Liliana Matos            | 1stdibs                  | New York, NY
 | Ivan Goncharov           | graphql-js               | Lviv, UA
 | Matt Mahoney             | Facebook                 | Brooklyn, NY
 | Morris Matsa             | IBM                      | Boston, US
@@ -77,4 +79,5 @@ Example agenda item:
 1. Discuss RFC adding introspection shortcuts to determine full typename and named type’s name (15m, Terrence)
    - [#710 - Add namedType and punctuatedName to __Type](https://github.com/graphql/graphql-spec/pull/710)
 1. [Input Union RFC](https://github.com/graphql/graphql-spec/blob/master/rfcs/InputUnion.md)
+1. [@defer/@stream arguments and payload format](https://github.com/graphql/graphql-spec/blob/9b68b7a2b44913490c5e7c2b94c828b7a8157b7c/rfcs/DeferStream.md#defer) (20m, Rob / Liliana)
 1. *ADD YOUR AGENDA ABOVE*