Update development status to beta

Author: nickgaya

setup.py

@@ -19,7 +19,7 @@
     packages=["redbucket"],
     package_data={'redbucket': ['py.typed']},
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",