feat: release_status to production/stable (#189)

Package name: **google-cloud-dialogflow**
Current release: **beta**
Proposed release: **GA**

## Instructions

Check the lists below, adding tests / documentation as required. Once all the "required" boxes are ticked, please create a release and close this issue.

## Required

- [ ] 28 days elapsed since last beta release with new API surface
- [ ] Server API is GA
- [ ] Package API is stable, and we can commit to backward compatibility
- [ ] All dependencies are GA

## Optional

- [ ] Most common / important scenarios have descriptive samples
- [ ] Public manual methods have at least one usage sample each (excluding overloads)
- [ ] Per-API README includes a full description of the API
- [ ] Per-API README contains at least one “getting started” sample using the most common API scenario
- [ ] Manual code has been reviewed by API producer
- [ ] Manual code has been reviewed by a DPE responsible for samples
- [ ] 'Client Libraries' page is added to the product documentation in 'APIs & Reference' section of the product's documentation on Cloud Site

.repo-metadata.json

@@ -4,7 +4,7 @@
   "product_documentation": "https://www.dialogflow.com/",
   "client_documentation": "https://googleapis.dev/python/dialogflow/latest",
   "issue_tracker": "https://issuetracker.google.com/savedsearches/5300385",
-  "release_level": "beta",
+  "release_level": "ga",
   "language": "python",
   "repo": "googleapis/dialogflow-python-client-v2",
   "distribution_name": "dialogflow",

README.rst

@@ -68,17 +68,16 @@ Versioning
 
 This library follows `Semantic Versioning <http://semver.org/>`_.
 
-This library is considered to be in **beta**. This means it is expected to be
-mostly stable while we work toward a general availability release; however,
-complete stability is not guaranteed. We will address issues and requests
-against beta libraries with a high priority.
+This library is considered to be stable. This means and that the code surface will not change in backwards-incompatible
+ways unless either absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation
+period. Issues and requests against GA libraries are addressed with the highest priority.
 
-More Information: `Google Cloud Platform Launch Stages <https://cloud.google.com/terms/launch-stages>`_
+More Information: `Google Cloud Python Library Support <https://github.com/googleapis/google-cloud-python/blob/master/README.rst#general-availability>`_
 
 Contributing
 ------------
 
-Contributions welcome! See the `Contributing Guide <https://github.com/googleapis/python-dialogflow/blob/master/.github/CONTRIBUTING.rst>`_.
+Contributions welcome! See the `Contributing Guide <https://github.com/googleapis/python-dialogflow/blob/master/.github/CONTRIBUTING.md>`_.
 
 License
 -------
@@ -88,5 +87,5 @@ Apache Version 2.0
 See `the LICENSE file <https://github.com/googleapis/python-dialogflow/blob/master/LICENSE>`_ for more information.
 
 
-.. |release level| image:: https://img.shields.io/badge/release%20level-beta-yellow.svg?style&#x3D;flat
-    :target: https://cloud.google.com/terms/launch-stages
+.. |release level| image:: https://img.shields.io/badge/support-GA-gold.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#general-availability

setup.py

@@ -20,7 +20,7 @@
 name = "dialogflow"
 description = "Client library for the Dialogflow API"
 version = "0.8.0"
-release_status = "Development Status :: 4 - Beta"
+release_status = "Development Status :: 5 - Production/Stable"
 dependencies = ["google-api-core[grpc] >= 1.14.0, < 2.0.0dev"]
 
 package_root = os.path.abspath(os.path.dirname(__file__))