feat: release as production/stable (#15)

Release-As: 1.0.0

.repo-metadata.json

@@ -4,7 +4,7 @@
     "product_documentation": "https://cloud.google.com/billing",
     "client_documentation": "https://googleapis.dev/python/cloudbilling/latest",
     "issue_tracker": "",
-    "release_level": "beta",
+    "release_level": "ga",
     "language": "python",
     "repo": "googleapis/python-billing",
     "distribution_name": "google-cloud-billing",

README.rst

@@ -1,16 +1,16 @@
 Python Client for Cloud Billing API
 ==============================================
 
-|beta| |pypi| |versions|
+|ga| |pypi| |versions|
 
 `Cloud Billing API`_: Allows developers to manage billing for their Google Cloud Platform
 projects     programmatically.
 
 - `Client Library Documentation`_
 - `Product Documentation`_
 
-.. |beta| image:: https://img.shields.io/badge/support-beta-orange.svg
-   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#beta-support
+.. |ga| image:: https://img.shields.io/badge/support-GA-gold.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#general-availability
 .. |pypi| image:: https://img.shields.io/pypi/v/google-cloud-billing.svg
    :target: https://pypi.org/project/google-cloud-billing/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-billing.svg

noxfile.py

@@ -139,7 +139,7 @@ def docs(session):
     """Build the docs for this library."""
 
     session.install("-e", ".")
-    session.install("sphinx", "alabaster", "recommonmark")
+    session.install("sphinx<3.0.0", "alabaster", "recommonmark")
 
     shutil.rmtree(os.path.join("docs", "_build"), ignore_errors=True)
     session.run(

setup.py

@@ -50,7 +50,7 @@
     setup_requires=["libcst >= 0.2.5"],
     scripts=["scripts/fixup_keywords.py"],
     classifiers=[
-        "Development Status :: 4 - Beta",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3.6",