Support for type annotations in `curried`

[mdowds]

Hi, first thanks to everyone for continuing to maintain this library.

Currently when trying to use the curried decorator on a function with type annotations the following error is raised:
Traceback (most recent call last): File "<input>", line 1, in <module> File "C:\Python35\lib\inspect.py", line 1045, in getargspec raise ValueError("Function has keyword-only arguments or annotations" ValueError: Function has keyword-only arguments or annotations, use getfullargspec() API which can support them

Swapping out getargspec() in curried for getfullargspec() does fix the issue and I'm happy to submit a PR with the change, but I'm not sure how best to write a test as type annotations are a Python3-only feature, as are keyword-only arguments.