add ruby 2.1.1 as a seperate travis entry

JonRowe · JonRowe · commit e0870ce58cdc · 2014-02-25T11:34:39.000+11:00
diff --git a/travis/.travis.yml b/travis/.travis.yml
@@ -7,6 +7,7 @@ rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.0
+  - 2.1.1
   - ruby-head
   - ree
   - jruby-18mode
