.travis.yml in squib-0.8.0 vs .travis.yml in squib-0.9.0

@@ -3,5 +3,9 @@
 cache: bundler # maybe someday they'll add support for us freeloaders...
 rvm:
   - 2.0
   - 2.1
   - 2.2
+  - 2.3
+matrix:
+  allow_failures:
+    - rvm: 2.3