Add dev status inactive classifier, edit long description

setup.py

@@ -82,6 +82,19 @@
     ])
 
 long_description = """
+===========
+End of life
+===========
+
+This project is no longer maintained.
+
+Use the standard library `ast` module instead.
+See https://github.com/python/typed_ast/issues/179.
+
+===========
+Description
+===========
+
 `typed_ast` is a Python 3 package that provides a Python 2.7 and Python 3
 parser similar to the standard `ast` library.  Unlike `ast` below Python 3.8,
 the parsers in
@@ -111,7 +124,7 @@
        license='Apache License 2.0',
        platforms = ['POSIX', 'Windows'],
        classifiers = [
-           'Development Status :: 5 - Production/Stable',
+           'Development Status :: 7 - Inactive',
            'Environment :: Console',
            'Intended Audience :: Developers',
            'Operating System :: POSIX',
@@ -121,6 +134,7 @@
            'Programming Language :: Python :: 3.8',
            'Programming Language :: Python :: 3.9',
            'Programming Language :: Python :: 3.10',
+           'Programming Language :: Python :: 3.11',
            'Topic :: Software Development',
        ],
        python_requires=">=3.6",