Basic example does not work on Windows
I tried running the readme example code on Windows and it fails as soon as you import an external nim modele. I do not get any error messages, python just seems to quietly die. It does work on macos.

The example, copied verbatim from the readme.md is as follows:

nim_math.nim:
~~~nim
import nimpy

proc add(a: int, b: int): int {.exportpy.} =
    return a + b
~~~

nimporter_test.py:
~~~python
import nimporter, nim_math

print(nim_math.add(2, 4))  # 6
~~~

In order to check that the nim code worked, I added a "when is_main_module" clause:

~~~nim
import nimpy

proc add(a: int, b: int): int {.exportpy.} =
    return a + b

when is_main_module:
    echo add(2, 3)
~~~

When I run this directly with nim it prints 5 as expected.
