Attempt to test the PR.

With this commit and without the main commit of this PR,
packages/apollo-gateway/src/__tests__/gateway/reporting.test.ts fails because
the trace contains RootQuery instead of Query. (So this test is actually testing
something.)

However, other test files seem to fail with this change and I'm not sure why.

Author: glasser

packages/apollo-gateway/src/__tests__/__fixtures__/schemas/accounts.ts

@@ -6,7 +6,12 @@ export const typeDefs = gql`
   directive @stream on FIELD
   directive @transform(from: String!) on FIELD
 
-  extend type Query {
+  schema {
+    query: RootQuery
+    mutation: Mutation
+  }
+
+  type RootQuery {
     user(id: ID!): User
     me: User
   }
@@ -36,7 +41,7 @@ export const typeDefs = gql`
     metadata: [UserMetadata]
   }
 
-  extend type Mutation {
+  type Mutation {
     login(username: String!, password: String!): User
   }
 
@@ -80,7 +85,7 @@ const libraryUsers: { [name: string]: string[] } = {
 };
 
 export const resolvers: GraphQLResolverMap<any> = {
-  Query: {
+  RootQuery: {
     user(_, args) {
       return { id: args.id };
     },