windows compile fix in oldisospecpy

Author: michalsta

pyproject.toml

@@ -12,7 +12,7 @@ description = "IsoSpecPy is a Python library for computing isotopic distribution
 version = "2.3.0dev4"
 
 [project.optional-dependencies]
-testing = ["pytest", "numpy", "OldIsoSpecPy @ https://files.pythonhosted.org/packages/09/e5/aa1f8c753afae7fbbb4a91f1aa1109e8308bc09120c02712e99f3439e355/oldisospecpy-1.0.10.tar.gz"]
+testing = ["pytest", "numpy", "OldIsoSpecPy @ https://files.pythonhosted.org/packages/95/b8/181b61fd1762304d5d0b897624b3773494840cbfc3b6af1494b02bddc372/oldisospecpy-1.0.11.tar.gz"]
 
 [tool.pytest.ini_options]
 testpaths = ["tests/Python"]