[fix] Fixed development status in setup.py

Without this fix, the package will not upload to PyPI

Author: pandafy

setup.py

@@ -65,7 +65,7 @@ def get_install_requires():
     include_package_data=True,
     zip_safe=False,
     classifiers=[
-        'Development Status :: 5 - Production/Stable ',
+        'Development Status :: 5 - Production/Stable',
         'Environment :: Console',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',