Version bump for language / metapackage. (#4326)

Author: lukesneeringer

CHANGELOG.md

@@ -4,6 +4,27 @@
 
 [1]: https://pypi.org/project/google-cloud-language/#history
 
+## 0.31.0
+
+### Release Candidate
+
+  * This update is considered a final "release candidate", and
+    the `google-cloud-language` package is preparing for a GA release
+    in the near future.
+
+### :warning: Breaking Changes!
+
+  * Some rarely-used arguments to the `LanguageServiceClient` constructor
+    have been removed (in favor of a subclass or a custom gRPC channel).
+    It is unlikely that you used these, but if you did, then this update
+    will represent a breaking change.
+      * The removed arguments are: `client_config`, `lib_name`, `lib_version`
+        `metrics_headers`, `ssl_credentials`, and `scopes`.
+
+### Features
+
+  * Added the `classify_text` method on the primary (`v1`) endpoint. (#4283)
+
 ## 0.30.0
 
 ### Documentation

setup.py

@@ -60,7 +60,7 @@
 
 setup(
     name='google-cloud-language',
-    version='0.30.1.dev1',
+    version='0.31.0',
     description='Python Client for Google Cloud Natural Language',
     long_description=README,
     namespace_packages=[