Updated setup.py with correct classifiers

Author: Abhishek Singh

setup.py

@@ -23,15 +23,13 @@
 
 
 classifiers = [
-    'Development Status :: 4 - Beta',
+    'Development Status :: 5 - Production/Stable',
     'Intended Audience :: Education',
     'Intended Audience :: Developers',
     'Intended Audience :: Science/Research',
     'Topic :: Text Processing :: Linguistic',
     'Topic :: Text Processing :: Indexing',
     'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
-    'Programming Language :: Python :: 2.7',
-    'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',