chore: update changelog for 3.1.1 release (#168)

juancarlostong · web-flow · commit 4ae6c4735d02 · 2019-06-19T14:33:29.000-07:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 3.1.1
+June 19th, 2019
+
+### Bug Fixes:
+* Build OptimizelySDK.NetStandard16.dll in Release mode
+
 ## 3.1.0
 May 9th, 2019
 
