Update travis

Author: mullermp

.travis.yml

@@ -1,13 +1,23 @@
 language: ruby
 
+before_install:
+  - gem install bundler -v '< 2'
+
+dist: xenial
+group: edge
+
 rvm:
   - 1.9.3
-  - 2.0.0
+  - 2.0
   - 2.1
   - 2.2
-  - 2.3.0
-  - 2.4.0
-  - jruby
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
+  - jruby-9.1
+  - jruby-9.2
 
 sudo: false
 
@@ -21,12 +31,14 @@ bundler_args: --without docs release repl
 
 matrix:
   exclude:
-    - rvm: jruby
+    - rvm: jruby-9.1
+      env: KITCHEN_SINK=1
+    - rvm: jruby-9.2
       env: KITCHEN_SINK=1
   include:
-    - rvm: 2.3.0
+    - rvm: 2.3
       env: OLD_OJ=1
-    - rvm: 2.3.0
+    - rvm: 2.3
       env: OLD_OX=1
 
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