bump version for v20.0.1 release

Author: mahmoud

setup.py

@@ -11,7 +11,7 @@
 
 
 __author__ = "Mahmoud Hashemi and Glyph Lefkowitz"
-__version__ = "20.0.1dev"
+__version__ = "20.0.1"
 __contact__ = "mahmoud@hatnote.com"
 __url__ = "https://github.com/python-hyper/hyperlink"
 __license__ = "MIT"