feat: bump release level to production/stable (#147)

Fixes #146  🦕

.repo-metadata.json

@@ -4,7 +4,7 @@
   "product_documentation": "https://cloud.google.com/security-command-center",
   "client_documentation": "https://googleapis.dev/python/securitycenter/latest",
   "issue_tracker": "https://issuetracker.google.com/savedsearches/559748",
-  "release_level": "alpha",
+  "release_level": "ga",
   "language": "python",
   "library_type": "GAPIC_AUTO",
   "repo": "googleapis/python-securitycenter",

README.rst

@@ -1,14 +1,14 @@
-Python Client for Cloud Security Command Center API (`Alpha`_)
-==============================================================
-|alpha| |pypi| |versions| 
+Python Client for Cloud Security Command Center API
+===================================================
+|GA| |pypi| |versions| 
 
 `Cloud Security Command Center API`_: The public Cloud Security Command Center API.
 
 - `Client Library Documentation`_
 - `Product Documentation`_
 
-.. |alpha| image:: https://img.shields.io/badge/support-alpha-orange.svg
-   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#alpha-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-securitycenter.svg
    :target: https://pypi.org/project/google-cloud-securitycenter/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-securitycenter.svg

setup.py

@@ -22,7 +22,7 @@
 name = "google-cloud-securitycenter"
 description = "Cloud Security Command Center API client library"
 version = "1.2.0"
-release_status = "Development Status :: 3 - Alpha"
+release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.22.2, < 2.0.0dev",
     "grpc-google-iam-v1 >= 0.12.3, < 0.13dev",