Merge pull request #1561 from groyoh/update_changelog

Add entry in CHANGELOG for #1545

Author: NullVoxPopuli

CHANGELOG.md

@@ -31,6 +31,8 @@ Fixes:
 - [#1488](https://github.com/rails-api/active_model_serializers/pull/1488) Require ActiveSupport's string inflections (@nate00)
 
 Misc:
+- [#1545](https://github.com/rails-api/active_model_serializers/pull/1545) Document how to pass arbitrary options to the
+  serializer (@CodedBeardedSignedTaylor)
 - [#1496](https://github.com/rails-api/active_model_serializers/pull/1496) Run all branches against JRuby on CI (@nadavshatz)
 - [#1559](https://github.com/rails-api/active_model_serializers/pull/1559) Add a deprecation DSL. (@bf4 @groyoh)
 - [#1543](https://github.com/rails-api/active_model_serializers/pull/1543) Add the changes missing from #1535. (@groyoh)