fix(build): setuptools syntax

Author: accraze

setup.py

@@ -33,6 +33,7 @@ def read(*names, **kwargs):
         re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst'))
     ),
     author='Discogs',
+    author_email='',
     maintainer_email='accraze@gmail.com',
     maintainer = 'Andy Craze',
     url='https://github.com/discogs/python-livingdocs',