old_contents: import re
  from pathlib import Path
  
  from setuptools import find_packages, setup
  
  
  VERSION_REGEX = r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]'
  
  init = Path("src/aiosmtplib/__init__.py")
  readme = Path(__file__).with_name("README.rst")
  version_match = re.search(VERSION_REGEX, init.read_text("utf-8"), re.MULTILINE)
  
  if version_match:
      version = version_match.group(1)
  else:
      raise RuntimeError("Cannot find version information")
  
  setup(
      name="aiosmtplib",
      version=version,
      description="asyncio SMTP client",
      long_description=readme.read_text("utf-8"),
      author="Cole Maclean",
      author_email="hi@cole.io",
      url="https://github.com/cole/aiosmtplib",
      packages=find_packages("src"),
      package_dir={"": "src"},
      license="MIT",
      keywords=["smtp", "email", "asyncio"],
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "Environment :: No Input/Output (Daemon)",
          "Framework :: AsyncIO",
          "Intended Audience :: Developers",
          "License :: OSI Approved :: MIT License",
          "Natural Language :: English",
          "Operating System :: OS Independent",
          "Programming Language :: Python",
          "Programming Language :: Python :: 3",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3 :: Only",
          "Programming Language :: Python :: Implementation :: CPython",
          "Programming Language :: Python :: Implementation :: PyPy",
          "Topic :: Communications :: Email",
      ],
      python_requires=">=3.5.2",
      extras_require={
          "docs": ["sphinx", "sphinx_autodoc_typehints"],
          "testing": ["aiosmtpd", "hypothesis", "pytest", "pytest-asyncio", "pytest-cov"],
      },
  )
  
new_contents: import re
  from pathlib import Path
  
  from setuptools import find_packages, setup
  
  
  VERSION_REGEX = r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]'
  
  init = Path("src/aiosmtplib/__init__.py")
  readme = Path(__file__).with_name("README.rst")
  version_match = re.search(VERSION_REGEX, init.read_text("utf-8"), re.MULTILINE)
  
  if version_match:
      version = version_match.group(1)
  else:
      raise RuntimeError("Cannot find version information")
  
  setup(
      name="aiosmtplib",
      version=version,
      description="asyncio SMTP client",
      long_description=readme.read_text("utf-8"),
      author="Cole Maclean",
      author_email="hi@cole.io",
      url="https://github.com/cole/aiosmtplib",
      packages=find_packages("src"),
      package_dir={"": "src"},
      license="MIT",
      keywords=["smtp", "email", "asyncio"],
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "Environment :: No Input/Output (Daemon)",
          "Framework :: AsyncIO",
          "Intended Audience :: Developers",
          "License :: OSI Approved :: MIT License",
          "Natural Language :: English",
          "Operating System :: OS Independent",
          "Programming Language :: Python",
          "Programming Language :: Python :: 3",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3 :: Only",
          "Programming Language :: Python :: Implementation :: CPython",
          "Programming Language :: Python :: Implementation :: PyPy",
          "Topic :: Communications",
          "Topic :: Communications :: Email",
          "Topic :: Software Development :: Libraries",
          "Topic :: Software Development :: Libraries :: Python Modules",
          "Typing :: Typed",
      ],
      python_requires=">=3.5.2",
      extras_require={
          "docs": ["sphinx", "sphinx_autodoc_typehints"],
          "testing": ["aiosmtpd", "hypothesis", "pytest", "pytest-asyncio", "pytest-cov"],
      },
  )
  
subject: Add additional classifiers