.travis.yml in ransack-0.5.8 vs .travis.yml in ransack-0.6.0

@@ -2,6 +2,9 @@
   - 1.8.7
   - 1.9.2
   - ree
   - rbx
   - rbx-2.0
-  - ruby-head
\ No newline at end of file
+  - ruby-head
+
+env:
+  - RAILS=3-2-stable