.travis.yml in uglifier-4.0.2 vs .travis.yml in uglifier-4.1.0

@@ -3,32 +3,33 @@
 cache: bundler
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.10
-  - 2.2.8
-  - 2.3.5
-  - 2.4.2
+  - 2.2.9
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
   - ruby-head
   - jruby-19mode
-  - jruby-9.1.13.0
+  - jruby-9.1.15.0
 before_install:
-  - gem install bundler -v 1.15.4
+  - gem install bundler -v 1.16.1
 git:
   submodules: false
 gemfile:
   - Gemfile
 matrix:
   include:
-    - rvm: 2.4.2
+    - rvm: 2.5.0
       gemfile: gemfiles/rubyracer
-    - rvm: jruby-9.1.13.0
+    - rvm: jruby-9.1.15.0
       gemfile: gemfiles/rubyrhino
-    - rvm: 2.4.2
+    - rvm: 2.5.0
       gemfile: gemfiles/alaska
       env: ALASKA=1
   allow_failures:
-    - rvm: 2.4.2
+    - rvm: 2.5.0
       gemfile: gemfiles/alaska
       env: ALASKA=1
     - rvm: ruby-head
   fast_finish: true