Add classifiers, require Python >3.6.

Author: Gadgetoid

library/setup.py

@@ -12,6 +12,14 @@ def run(self):
         print("Compiling ws281x library...")
         build_py.run(self)
 
+classifiers = ['Development Status :: 4 - Beta',
+               'Operating System :: POSIX :: Linux',
+               'License :: OSI Approved :: MIT License',
+               'Intended Audience :: Developers',
+               'Programming Language :: Python :: 3',
+               'Topic :: Software Development',
+               'Topic :: System :: Hardware']
+
 setup(name              = 'rpi_ws281x',
       version           = '5.0.0',
       author            = 'Jeremy Garff <[email protected]>, Phil Howard <[email protected]>',
@@ -20,6 +28,8 @@ def run(self):
       long_description  = open('README.rst').read() + "\n\n" + open('CHANGELOG.txt').read(),
       license           = 'MIT',
       url               = 'https://github.com/rpi-ws281x/rpi-ws281x-python/',
+      classifiers       = classifiers,
+      python_requires   = '>=3.6',
       cmdclass          = {'build_py':CustomInstallCommand},
       packages          = ['rpi_ws281x'],
       ext_modules       = [Extension('_rpi_ws281x',