fix: use enum value in GraphQLEnumValueDefinition

[tKe]

📝 Description

Attempting to output an enum value with a custom @GraphQLName annotation will currently result in something like:

SerializationError{path=[enumOutputs, 3], exception=graphql.schema.CoercingSerializeException: Invalid input for enum 'MyTestEnum'. Unknown value 'FOUR'}

This PR changes the GraphQLEnumValueDefinition value to be the enum entry itself rather than the graphql name, which allows graphql-java to correctly resolve the name from the definition.

🔗 Related Issues