Add some classifiers.

setup.py

@@ -31,6 +31,15 @@ setup(name='tempstorage',
       author_email='zope-dev@zope.org',
       long_description=long_description,
       classifiers=[
+          "Development Status :: 7 - Inactive",
+          "Environment :: Web Environment",
+          "Framework :: ZODB",
+          "Framework :: Zope",
+          "Framework :: Zope :: 4",
+          "Intended Audience :: Developers",
+          "License :: OSI Approved",
+          "License :: OSI Approved :: Zope Public License",
+          "Operating System :: OS Independent",
           "Programming Language :: Python",
           "Programming Language :: Python :: 2",
           "Programming Language :: Python :: 2.7",
@@ -40,6 +49,9 @@ setup(name='tempstorage',
           "Programming Language :: Python :: 3.7",
           "Programming Language :: Python :: Implementation :: CPython",
           "Programming Language :: Python :: Implementation :: PyPy",
+          "Topic :: Internet",
+          "Topic :: Internet :: WWW/HTTP",
+          "Topic :: Internet :: WWW/HTTP :: Session",
       ],
       packages=find_packages('src'),
       package_dir={'': 'src'},