Upgrade to GraphiQL v2.0 (or v3.0?), using the built-in Explorer plugin #1902
Description
The new GraphiQL v2.0 has the Explorer already integrated as a plugin:
- https://github.com/graphql/graphiql/tree/main/packages/graphiql
- https://github.com/graphql/graphiql/tree/main/packages/graphiql-plugin-explorer
Upgrade GraphiQL to either v2.0 or v3.0 (where the Explorer will be bundled more natively), and then remove module "GraphiQL Explorer" from the GraphQL API plugin, which will not make sense anymore.