feat: set release_status to production/stable (#9)

# **RELEASE AFTER:  June 10, 2020**

Release-As: 1.0.0

Current release: **beta**

## 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

- [x] 28 days elapsed since last beta release with new API surface. [last release on May 13](https://github.com/googleapis/python-dlp/releases/)
- [x] Server API is GA (API is [v2](https://github.com/googleapis/python-dlp/tree/master/google/cloud/dlp_v2))
- [x] Package API is stable, and we can commit to backward compatibility
- [x] 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

@@ -4,10 +4,10 @@
   "product_documentation": "https://cloud.google.com/dlp/docs/",
   "client_documentation": "https://googleapis.dev/python/dlp/latest",
   "issue_tracker": "",
-  "release_level": "alpha",
+  "release_level": "ga",
   "language": "python",
   "repo": "googleapis/python-dlp",
   "distribution_name": "google-cloud-dlp",
   "api_id": "dlp.googleapis.com",
   "requires_billing": true
-}
+}

README.rst

@@ -1,7 +1,7 @@
 Python Client for Cloud Data Loss Prevention (DLP) API
 ======================================================
 
-|alpha| |pypi| |versions| 
+|GA| |pypi| |versions| 
 
 `Cloud Data Loss Prevention (DLP) API`_: Provides methods for detection, risk analysis, and de-identification of
 privacy-sensitive fragments in text, images, and Google Cloud Platform
@@ -10,8 +10,8 @@ storage repositories.
 - `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-dlp.svg
    :target: https://pypi.org/project/google-cloud-dlp/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-dlp.svg

setup.py

@@ -22,7 +22,7 @@
 name = "google-cloud-dlp"
 description = "Cloud Data Loss Prevention (DLP) API API client library"
 version = "0.15.0"
-release_status = "Development Status :: 3 - Alpha"
+release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.14.0, < 2.0.0dev",
     'enum34; python_version < "3.4"',