.travis.yml in tty-table-0.9.0 vs .travis.yml in tty-table-0.10.0

@@ -6,12 +6,13 @@
 bundler_args: --without yard benchmarks
 script: "bundle exec rake ci"
 rvm:
   - 2.0.0
   - 2.1.10
-  - 2.2.6
-  - 2.3.3
-  - 2.4.1
+  - 2.2.8
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
   - ruby-head
   - jruby-9.1.1.0
   - jruby-head
 matrix:
   allow_failures: