Update CHANGELOG.md

LeFnord · web-flow · commit 0e04aa561373 · 2018-03-28T21:54:15.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -3,6 +3,7 @@
 #### Features
 
 * Your contribution here.
+* [#300](https://github.com/ruby-grape/grape-entity/pull/300): Loosens activesupport to 3 - [@ericschultz](https://github.com/ericschultz).
 
 #### Fixes
 
