.travis.yml in sshkit-1.8.1 vs .travis.yml in sshkit-1.9.0.rc1

@@ -1,6 +1,7 @@
 language: ruby
 rvm:
-  - 2.2.2
-  - 2.1.6
+  - 2.3.0
+  - 2.2.4
+  - 2.1.8
   - 2.0.0
-script: "rake test:units"
+script: "rake test:units lint"