Dynamically type request responses

[paulomarg]

WHY are these changes introduced?

Currently, when getting data from either the GraphQL or REST clients, the caller needs to manually cast the returned type which makes it more difficult than it needs to be to type the responses properly.

WHAT is this pull request doing?

Adding the option of typing the bodies of request responses when calling the appropriate methods.

Type of change

• Minor: New feature (non-breaking change which adds functionality)

Checklist

• I have added a changelog entry, prefixed by the type of change noted above
• I have added/updated tests for this change
• I have documented new APIs/updated the documentation for modified APIs (for public APIs)