Update setup.py

Author: Kronopt

setup.py

@@ -35,7 +35,7 @@
     classifiers=[
         'Development Status :: 4 - Beta',
         'Intended Audience :: Developers',
-        'License :: OSI Approved :: GPLv3 License',
+        'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',