.travis.yml in knapsack-1.3.4 vs .travis.yml in knapsack-1.4.0

@@ -4,9 +4,10 @@
 rvm:
   - 2.0.0
   - 2.1.5
   - 2.2.0
   - 2.2.2
+  - 2.2.3
 addons:
   code_climate:
     repo_token: 38686058eed480dd0fcf8bce9015733e0bae88e44e30f4a1ac63df8aec2f86d8
 before_install:
   - "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"