BLD: update description content type

Author: tacaswell

setup.py

@@ -3,32 +3,36 @@
 from setuptools import setup
 
 try:
-    descr = open(os.path.join(os.path.dirname(__file__), 'README.md')).read()
+    descr = open(os.path.join(os.path.dirname(__file__), "README.md")).read()
 except IOError:
-    descr = ''
+    descr = ""
 
 try:
     from pypandoc import convert
-    descr = convert(descr, 'rst', format='md')
+
+    descr = convert(descr, "rst", format="md")
 except ImportError:
     pass
 
-setup(name='slicerator',
-      version=versioneer.get_version(),
-      author='Daniel B. Allan',
-      author_email='[email protected]',
-      packages=['slicerator'],
-      description='A lazy-loading, fancy-sliceable iterable.',
-      url='http://github.com/soft-matter/slicerator',
-      cmdclass=versioneer.get_cmdclass(),
-      platforms='Cross platform (Linux, Mac OSX, Windows)',
-      license="BSD",
-      classifiers=['Development Status :: 4 - Beta',
-                   'Programming Language :: Python :: 3',
-                   'Programming Language :: Python :: 3.7',
-                   'Programming Language :: Python :: 3.8',
-                   'Programming Language :: Python :: 3.9',
-                   'Programming Language :: Python :: 3.10',
-                   ],
-      long_description=descr,
-      )
+setup(
+    name="slicerator",
+    version=versioneer.get_version(),
+    author="Daniel B. Allan",
+    author_email="[email protected]",
+    packages=["slicerator"],
+    description="A lazy-loading, fancy-sliceable iterable.",
+    url="http://github.com/soft-matter/slicerator",
+    cmdclass=versioneer.get_cmdclass(),
+    platforms="Cross platform (Linux, Mac OSX, Windows)",
+    license="BSD",
+    classifiers=[
+        "Development Status :: 4 - Beta",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+    ],
+    long_description=descr,
+    long_description_content_type="text/markdown",
+)