update travis

.travis.yml

@@ -2,16 +2,18 @@ sudo: false
 language: ruby
 cache: bundler
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.10
-  - 2.2.10
-  - 2.3.8
-  - 2.4.5
-  - 2.5.3
-  - 2.6.0
+  - 1.9
+  - 2.0
+  - 2.1
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
   - ruby-head
-  - jruby-9.2.5.0
+  - jruby-head
+  - jruby-9.2.9.0
+  - truffleruby
 before_install:
   - gem install bundler -v 1.17.3
 git:
@@ -20,16 +22,22 @@ gemfile:
   - Gemfile
 matrix:
   include:
-    - rvm: 2.5.3
+    - rvm: 2.5
       gemfile: gemfiles/rubyracer
-    - rvm: jruby-9.2.5.0
+    - rvm: jruby-9.2.9.0
       gemfile: gemfiles/rubyrhino
-    - rvm: 2.5.3
+    - rvm: jruby-head
+      gemfile: gemfiles/rubyrhino
+    - rvm: 2.5
       gemfile: gemfiles/alaska
       env: ALASKA=1
   allow_failures:
-    - rvm: 2.5.3
+    - rvm: 2.5
       gemfile: gemfiles/alaska
       env: ALASKA=1
     - rvm: ruby-head
+    - rvm: truffleruby
+    - rvm: jruby-head
+    - rvm: jruby-head
+      gemfile: gemfiles/rubyrhino
   fast_finish: true