Update setup.py

Author: wannaphong

setup.py

@@ -194,7 +194,7 @@
         "Thai language",
     ],
     classifiers=[
-        "Development Status :: 4 - Beta",
+        "Development Status :: 5 - Production/Stable",
         "Programming Language :: Python :: 3",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",