Attempt to fix Windows builds for PYPI

setup.py

@@ -21,7 +21,7 @@
 here = path.abspath(path.dirname(__file__))
 
 # Get the long description from the relevant file
-with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
+with open(path.join(here, 'README.rst'), "rt") as f:
     long_description = f.read()
 
 setup(