Added author_email to setup.py

Author: Nurdok

setup.py

@@ -16,6 +16,7 @@
     long_description=open('README.rst').read(),
     license='MIT',
     author='Amir Rachum',
+    author_email='[email protected]',
     url='https://github.com/PyCQA/pydocstyle/',
     classifiers=[
         'Intended Audience :: Developers',