Let UDF registration name its return dtype with ret_dtype - #613

Let UDF registration name its return dtype with ret_dtype#613

eriknw wants to merge 4 commits into

32-udf-typing-only-typespython-graphblas/python-graphblas:32-udf-typing-only-typesfrom

33-udf-ret-dtypepython-graphblas/python-graphblas:33-udf-ret-dtypeCopy head branch name to clipboard