Update 2019-12-05.md (#311)

Author: binaryseed

agendas/2019-12-05.md

@@ -32,6 +32,7 @@ agenda, edit this file.*
 | Michael Staib            | ChilliCream              | Zurich, Switzerland
 | Rafael Staib             | ChilliCream              | Zurich, Switzerland
 | Pascal Senn              | ChilliCream              | Zurich, Switzerland
+| Vince Foley              | New Relic, Absinthe      | Portland, OR, US
 | Evan Huus                | Shopify                  | Ottawa, ON, CA
 | *ADD YOUR NAME ABOVE TO ATTEND*
 
@@ -64,6 +65,10 @@ Example agenda item:
    - https://github.com/graphql/graphql-spec/pull/649
    - Compatibility concerns reserving a new directive name?
    - Ready for draft / stage 2?
+1. [Input Union RFC](https://github.com/graphql/graphql-spec/blob/master/rfcs/InputUnion.md) (20m, Vince)
+   - Review Evaluations
+   - Review new Criteria added
+   - Next steps?
 1. Make root query operation type optional (15m, Victor)
    - PR: https://github.com/graphql/graphql-spec/pull/631
    - Just solve Query use case for empty objects (https://github.com/graphql/graphql-spec/pull/606)