chore(setup): Update to setuptools #27

Change the setup.py file to use setuptools instead of distutils.
Added find_packages() into setup.py.
Added a docstring to setup.py.

closes #27

setup.py

@@ -1,30 +1,36 @@
 # !/usr/bin/env python
+"""Setup for cookiecutter-py3-package"""
+
+from setuptools import find_packages, setup
 
-from distutils.core import setup
 setup(
-    name='cookiecutter-pypackage',
-    packages=[],
-    version='0.1.0',
-    description='Cookiecutter template for a Python package',
-    author='Audrey Roy Greenfeld',
-    license='BSD',
-    author_email='aroy@alum.mit.edu',
-    url='https://github.com/audreyr/cookiecutter-pypackage',
-    keywords=['cookiecutter', 'template', 'package', ],
-    python_requires='>=3.6',
+    name="cookiecutter-pypackage",
+    packages=find_packages(exclude=("tests*", "testing*")),
+    version="0.1.0",
+    description="Cookiecutter template for a Python package",
+    author="Audrey Roy Greenfeld",
+    license="BSD",
+    author_email="aroy@alum.mit.edu",
+    url="https://github.com/audreyr/cookiecutter-pypackage",
+    keywords=[
+        "cookiecutter",
+        "template",
+        "package",
+    ],
+    python_requires=">=3.6",
     classifiers=[
-        'Development Status :: 4 - Beta',
-        'Environment :: Console',
-        'Intended Audience :: Developers',
-        'Natural Language :: English',
-        'License :: OSI Approved :: BSD License',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy',
-        'Topic :: Software Development',
+        "Development Status :: 4 - Beta",
+        "Environment :: Console",
+        "Intended Audience :: Developers",
+        "Natural Language :: English",
+        "License :: OSI Approved :: BSD License",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: Implementation :: CPython",
+        "Programming Language :: Python :: Implementation :: PyPy",
+        "Topic :: Software Development",
     ],
 )