[Code Generation] Need details about external types referenced in typesUsed array

[felipecsl]

From Slack discussion:

felipecsl [12:21 PM]
@martijnwalraven I was looking at the HeroAppearsIn query and the generated IR references the Episode type in the typesUsed array, however its definition can’t be found anywhere in the data. Also I checked the Swift code generated for that query and noticed that it does include a public enum Episode. Sounds like we’re gonna have to add the definition of any external types to the IR so we can generate code based solely on the IR. It sounds like the Swift generator is retrieving that data from somewhere else

[martijnwalraven]

I just published version 0.9.5 of apollo-codegen, which now includes type information as part of typesUsed. Types can be either EnumType or InputObjectType.

[sav007]

Issue to add support of enum types has been created: #22

[felipecsl]

This has been taken care of already. Will create a separate issue for handling InputObjectType