Fix install of 1.2.1 on Windows (#11)

Force cast to string from Pathlib.Path object types

Author: adamb70

setup.py

@@ -4,7 +4,7 @@
 from setuptools import setup, find_packages
 
 # allow setup.py to be run from any path
-os.chdir(Path(__file__).absolute().parent)
+os.chdir(str(Path(__file__).absolute().parent))
 
 if 'publish' in sys.argv:
     if 'test' in sys.argv: