.travis.yml in cloudflare-3.2.1 vs .travis.yml in cloudflare-4.0.0

@@ -1,24 +1,22 @@
 language: ruby
-sudo: false
-dist: trusty
+dist: xenial
 cache: bundler
 
-before_script:
-  - gem update --system
-  - gem install bundler
-
-rvm:
-- 2.2
-- 2.3
-- 2.4
-- 2.5
-- 2.6
-- jruby-head
-- ruby-head
 matrix:
+  include:
+    - rvm: 2.3
+    - rvm: 2.4
+    - rvm: 2.5
+    - rvm: 2.6
+    - rvm: jruby-head
+      env: JRUBY_OPTS="--debug -X+O"
+    - rvm: truffleruby
+    - rvm: ruby-head
   allow_failures:
-  - rvm: ruby-head
-  - rvm: jruby-head
+    - rvm: ruby-head
+    - rvm: jruby-head
+    - rvm: truffleruby
+
 env:
   global:
     secure: c5yG7N1r9nYuw47Y90jGeoHNvkL59AAC55dtPAhKP+gjXWW8hKbntj3oj+lVkxEqzRpzEQgYZzUElrP+6mJnb20ldclZg03L56243tMtVEcpGOx/MFhnIBkx3kKu1H6ydKKMxieHxjsLQ3vnpcIZ3p0skTQjYbjdu607tjbyg7s=