.travis.yml in grape-swagger-1.1.0 vs .travis.yml in grape-swagger-1.2.0

- old
+ new

@@ -31,5 +31,7 @@
 
   allow_failures:
     - rvm: 2.4.10
     - rvm: ruby-head
     - rvm: jruby-head
+
+    - env: GRAPE_VERSION=HEAD