python: update classifier for setup.py

Author: aquynh

bindings/python/setup.py

@@ -186,6 +186,16 @@ def dummy_src():
     long_description_content_type="text/markdown",
     url='https://www.keystone-engine.org',
     classifiers=[
+        # How mature is this project? Common values are
+        #   3 - Alpha
+        #   4 - Beta
+        #   5 - Production/Stable
+        'Development Status :: 4 - Beta',
+
+        # Indicate who your project is intended for
+        'Intended Audience :: Developers',
+        'Topic :: Software Development :: Build Tools',
+
         'License :: OSI Approved :: BSD License',
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 3',