Add a pyproject.toml and setup.cfg

This enables building/installing without using deprecated setup.py (but
setup.py is still available).

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -0,0 +1,39 @@
+[metadata]
+name = pytest-timeout
+description = pytest plugin to abort hanging tests
+long_description = file: README.rst
+version = 2.1.0
+author = Floris Bruynooghe
+author_email = flub@devork.be
+url = https://github.com/pytest-dev/pytest-timeout
+license = MIT
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Environment :: Console
+    Environment :: Plugins
+    Intended Audience :: Developers
+    License :: DFSG approved
+    License :: OSI Approved :: MIT License
+    Operating System :: OS Independent
+    Programming Language :: Python
+    Programming Language :: Python :: Implementation :: PyPy
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Topic :: Software Development :: Testing
+    Framework :: Pytest
+
+[options]
+py_modules = pytest_timeout
+install_requires =
+    pytest>=5.0.0
+python_requires = >=3.7
+
+[options.entry_points]
+pytest11 =
+    timeout = pytest_timeout

setup.py

@@ -1,42 +1,5 @@
 """Setuptools install script for pytest-timeout."""
 from setuptools import setup
 
-with open("README.rst", encoding="utf-8") as f:
-    long_description = f.read()
-
-
-setup(
-    name="pytest-timeout",
-    description="pytest plugin to abort hanging tests",
-    long_description=long_description,
-    version="2.1.0",
-    author="Floris Bruynooghe",
-    author_email="flub@devork.be",
-    url="https://github.com/pytest-dev/pytest-timeout",
-    license="MIT",
-    py_modules=["pytest_timeout"],
-    entry_points={"pytest11": ["timeout = pytest_timeout"]},
-    install_requires=["pytest>=5.0.0"],
-    python_requires=">=3.7",
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Environment :: Console",
-        "Environment :: Plugins",
-        "Intended Audience :: Developers",
-        "License :: DFSG approved",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: Implementation :: PyPy",
-        "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Topic :: Software Development :: Testing",
-        "Framework :: Pytest",
-    ],
-)
+if __name__ == "__main__":
+    setup()