.travis.yml in dragonfly-1.3.0 vs .travis.yml in dragonfly-1.4.0

@@ -4,9 +4,10 @@
   - "2.3"
   - "2.4"
   - "2.5"
   - "2.6"
   - "2.7"
+  - "3.0"
   - "jruby"
 
 env:
   global:
     - SKIP_FLAKY_TESTS: true