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

@@ -3,11 +3,11 @@
 
 bundler_args: --without development doc
 
 rvm:
   - 2.2
-  - 2.3.1
-  - jruby-9.0.5.0
+  - 2.3.3
+  - jruby-9.1.6.0
 
 matrix:
   fast_finish: true
 
 branches: