changelog for 3.5.1

Author: JonRowe

Changelog.md

@@ -1,3 +1,12 @@
+### 3.5.1 / 2016-07-08
+[Full Changelog](http://github.com/rspec/rspec-rails/compare/v3.5.0...v3.5.1)
+
+Bugfixes:
+
+* Only attempt to load `ActionDispatch::IntegrationTest::Behavior` on Rails 5,
+  and above; Prevents possible `TypeError` when an existing `Behaviour` class
+  is defined. (#1660, Betesh).
+
 ### 3.5.0 / 2016-07-01
 [Full Changelog](http://github.com/rspec/rspec-rails/compare/v3.5.0.beta4...v3.5.0)