Add Ivan to Dec 2020 WG (graphql#560)

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

Author: IvanGoncharov

agendas/2020-12-03.md

@@ -35,6 +35,7 @@ agenda, edit this file.*
 | Evan Huus                | Shopify                  | Ottawa, ON, CA
 | Yogesh Desai             | Tokopedia                | Pune, India
 | Mark Larah               | Yelp                     | San Francisco, CA, US
+| Ivan Goncharov           | graphql-js               | Lviv, UA
 | Alan Cha                 | IBM Research             | Yorktown Heights, NY, US
 | Sasha Solomon            | Twitter                  | Portland, OR, US