.travis.yml in geolookup-0.5.10 vs .travis.yml in geolookup-0.6.0

@@ -2,6 +2,7 @@
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.0
   - 2.1.1
+  - 2.1.5
   - jruby-19mode
\ No newline at end of file