Update setup.py

Author: SidneyAllen

setup.py

@@ -29,7 +29,7 @@ def read_file(filename):
     author_email="[email protected]",
     python_requires=">=3.5",
     classifiers=[
-        "Development Status :: 2 - Pre-Alpha",
+        "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Natural Language :: English",