[setup.py] add Py3.9 classifier

Author: chrissimpkins

setup.py

@@ -70,7 +70,9 @@ def version_read():
     packages=find_packages("lib"),
     package_dir={"": "lib"},
     install_requires=["commandlines", "fontTools[ufo]>=3.31.0"],
-    entry_points={"console_scripts": ["ufolint = ufolint.app:main"],},
+    entry_points={
+        "console_scripts": ["ufolint = ufolint.app:main"],
+    },
     keywords="",
     include_package_data=True,
     extras_require=EXTRAS_REQUIRES,
@@ -85,6 +87,7 @@ def version_read():
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Text Processing :: Fonts",
     ],