.travis.yml in knapsack-0.3.0 vs .travis.yml in knapsack-0.4.0

@@ -4,9 +4,10 @@
   - 1.9.3
   - 2.0.0
   - 2.1.0
   - 2.1.1
   - 2.1.2
+  - 2.1.3
 addons:
   code_climate:
     repo_token: 38686058eed480dd0fcf8bce9015733e0bae88e44e30f4a1ac63df8aec2f86d8
 before_install:
   - "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"