GraphQL 15.7.0 Breaks Apollo Server

[dhay]

We use Apollo Server, which depends on the graphql-js package. The latest update to version 15.7.0 causes Typescript compilation errors related to GraphQLError. Specifically the change related to originalError in this commit: d8ca570

- readonly originalError: Maybe<Error>;
+ readonly originalError: Error | undefined;

Previously Maybe was defined as null | undefined | T. Changing this to only Error | undefined causes errors like the following:

node_modules/apollo-server-errors/dist/index.d.ts(10,5): error TS2416: Property 'originalError' in type 'ApolloError' is not assignable to the same property in base type 'GraphQLError'.
  Type 'Error | null | undefined' is not assignable to type 'Error | undefined'.
    Type 'null' is not assignable to type 'Error | undefined'.

This is true when using both Apollo server version 2.x or 3.x

[IvanGoncharov]

@dhay Thanks for reporting.
Fixed in https://github.com/graphql/graphql-js/releases/tag/v15.7.1

[charles-hill-work]

@IvanGoncharov Will this fix be ported to 16.x?