handler return type checking #1228

[jerizm]

I think what was happening was because , TInputHandlerResultProps = TResult was passed it allowed the return type to be inferred or overridden by the handler.

After removing , TInputHandlerResultProps = TResult from the handler the return type will be enforced by what is passed in to Middy<Event, Result...

This does mean, however, you cannot override the handler return type.

[willfarrell]

Thanks for the PR! However, I have chosen to merge #1244 instead as it's not a breaking change and is passing TS unit tests.

[jerizm]

@willfarrell great we're glad it fixes the return type enforcement. #1244, looks like it has the same issue with not being able to override the handler return type either.