.travis.yml in lightio-0.2.2 vs .travis.yml in lightio-0.3.0

- old
+ new

@@ -1,12 +1,12 @@
 sudo: false
 language: ruby
 rvm:
   - jruby-9.1.15.0 # latest stable
-  - 2.2.7
   - 2.3.4
   - 2.4.1
+  - 2.5.0
   - ruby-head
 
 env:
   global:
     - JRUBY_OPTS="--dev -J-Djruby.launch.inproc=true -J-Xmx1024M"
@@ -14,6 +14,7 @@
 
 matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-9.1.15.0
+    - rvm: 2.5.0
   fast_finish: true