feat: bump release level to production/stable (#59)

Fixes #38  🦕

.repo-metadata.json

@@ -4,7 +4,7 @@
     "product_documentation": "cloud.google.com/memorystore/docs/memcached/",
     "client_documentation": "https://googleapis.dev/python/memcache/latest",
     "issue_tracker": "",
-    "release_level": "beta",
+    "release_level": "ga",
     "language": "python",
     "library_type": "GAPIC_AUTO",
     "repo": "googleapis/python-memcache",

README.rst

@@ -1,16 +1,16 @@
 Python Client for Cloud Memorystore for Memcached
 =================================================
 
-|beta| |pypi| |versions|
+|GA| |pypi| |versions|
 
 `Cloud Memorystore for Memached API`_: Ship performant and highly available key value store, 
 compatible with OSS Memcached protocol.
 
 - `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-memcache.svg
    :target: https://pypi.org/project/google-cloud-memcache/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-memcache.svg

setup.py

@@ -45,7 +45,7 @@
     ),
     python_requires=">=3.6",
     classifiers=[
-        "Development Status :: 4 - Beta",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3.6",