Bump version for 0.4.6 release

Author: hancush

setup.py

@@ -12,7 +12,7 @@
     name='census_area',
     url='https://github.com/datamade/census_area',
     long_description=long_description,
-    version='0.4.5',
+    version='0.4.6',
     author='Forest Gregg',
     author_email='fgregg@datamade.us',
     description='Census data for arbitrary geographies',