Update uri.py

Fix for Python3 `__eq__` disables inheritance of `__hash__`

Author: agoose77

src/rfc3986/uri.py

@@ -97,6 +97,8 @@ def __new__(cls, scheme, authority, path, query, fragment,
         ref.encoding = encoding
         return ref
 
+    __hash__ = tuple.__hash__
+    
     def __eq__(self, other):
         """Compare this reference to another."""
         other_ref = other