.travis.yml in lastpass-1.4.0 vs .travis.yml in lastpass-1.5.0

@@ -1,5 +1,7 @@
 language: ruby
 rvm:
-  - 1.9.3
   - 2.0.0
-  - 2.1.5
+  - 2.1.10
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0