This fixes issues related to breaking changes in latest versions of
GoPy, which will now return concrete instances of corresponding classes
in iterators; previously, only a "pointer" would be returned, which
would've then needed to be set as the handle for a newly created
instance of a relevant class.
Closes: #17
GoPy 0.4.8 and beyond introduce breaking changes related types returned
in function calls (e.g. slice element types). Previously, these would be
a pointer handle which would then need to be set into a concrete
instance of the type required by callers; GoPy will now return concrete
instances itself.
Moving to the new semantics requires changes to code, and additional
testing; pinning the version helps us migrate on our own timeline.
Alex Palaistras
nicoco