[chore] Version bump to 0.4.0, beta. (#20)

Author: Luke Sneeringer

packages/proto-plus/README.rst

@@ -27,7 +27,7 @@ Disclaimer
 This is not an official Google product.
 
 
-.. |release level| image:: https://img.shields.io/badge/release%20level-alpha-red.svg?style=flat
+.. |release level| image:: https://img.shields.io/badge/release%20level-beta-yellow.svg?style=flat
   :target: https://cloud.google.com/terms/launch-stages
 .. |docs| image:: https://readthedocs.org/projects/proto-plus-python/badge/?version=latest
   :target: https://proto-plus-python.readthedocs.io/en/latest/

packages/proto-plus/setup.py

@@ -25,7 +25,7 @@
 
 setup(
     name='proto-plus',
-    version='0.3.0',
+    version='0.4.0',
     license='Apache 2.0',
     author='Luke Sneeringer',
     author_email='lukesneeringer@google.com',
@@ -39,7 +39,7 @@
         'protobuf >= 3.5.1',
     ),
     classifiers=[
-        'Development Status :: 3 - Alpha',
+        'Development Status :: 4 - Beta',
         'Environment :: Console',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',