FEATURE: Type config on schema

[simstern]

Hi,

When using interfaces but never referencing the implemented types in the schema, the concrete types are not scanned and therefore not know to the schema. As a solution those types can be loaded via the type config.

Settings:

Wwwision:
  GraphQL:
    endpoints:
      graphql:
        configTypes:
          - Foo\Bar\Type\Object\HumanType
          - Foo\Bar\Type\Object\DroidType

Does this implementation make sense in the context of this package? Any suggestion for improvement?

The problem is also described here: webonyx/graphql-php#99

[bwaidelich]

Hey,
thanks for this contribution and sorry for the long delay - my github notifications were configured weirdly..