Get new changelog section

dshelbyo · dshelbyo · commit ce366d136da9 · 2019-01-15T13:52:41.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,4 +1,5 @@
-## 3.12.0 (Unreleased)
+## 3.12.1 (Unreleased)
+## 3.12.0 (January 15, 2019)
 
 ### Added
 - Support for `retry_duration_seconds` option to configure length of retry in the face of HTTP 429 and 500 errors
