refactor: setup.cfg and dev requirements (#504)

* refactor: use setup.cfg instead

* refactor: use dev extra

* fix: restore dev requiremetns

setup.py

@@ -1,49 +1,5 @@
 # -*- coding: utf-8 -*-
-from pathlib import Path
 
-try:
-    from setuptools import setup
-except ImportError:
-    from distutils.core import setup
+from setuptools import setup
 
-this_directory = Path(__file__).parent
-long_description = (this_directory / 'README.md').read_text(encoding='utf-8')
-
-setup(
-    name='cibuildwheel',
-    version='1.7.4',
-    install_requires=['bashlex!=0.13', 'toml', 'certifi'],
-    description="Build Python wheels on CI with minimal configuration.",
-    long_description=long_description,
-    long_description_content_type='text/markdown',
-    author="Joe Rickerby",
-    author_email='joerick@mac.com',
-    url='https://github.com/joerick/cibuildwheel',
-    project_urls={
-        'Changelog': 'https://github.com/joerick/cibuildwheel#changelog',
-        'Documentation': 'https://cibuildwheel.readthedocs.io/',
-    },
-    packages=['cibuildwheel', ],
-    license="BSD",
-    zip_safe=False,
-    package_data={
-        'cibuildwheel': ['resources/*'],
-    },
-    # Supported python versions
-    python_requires='>=3.6',
-    keywords='ci wheel packaging pypi travis appveyor macos linux windows',
-    classifiers=[
-        'Intended Audience :: Developers',
-        'Natural Language :: English',
-        'Programming Language :: Python :: 3',
-        'Development Status :: 5 - Production/Stable',
-        'License :: OSI Approved :: BSD License',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Topic :: Software Development :: Build Tools',
-    ],
-    entry_points={
-        'console_scripts': [
-            'cibuildwheel = cibuildwheel.__main__:main',
-        ],
-    },
-)
+setup()