.travis.yml in einhorn-0.7.1 vs .travis.yml in einhorn-0.7.2

@@ -1,8 +1,10 @@
 language: ruby
 rvm:
-  - 1.8.7
-  - 1.9.2
-  - 1.9.3
   - 2.0.0
   - 2.1
-  - ree
+  - 2.2
+
+# This is to work around the version of bundler installed in Travis and
+# https://github.com/bundler/bundler/issues/3558
+before_install:
+  - gem update bundler