.travis.yml in omml2mathml-0.0.5 vs .travis.yml in omml2mathml-0.0.6

@@ -1,17 +1,18 @@
+# Auto-generated !!! Do not edit it manually
+# use ci-master https://github.com/metanorma/metanorma-build-scripts
 language: ruby
 cache: bundler
 os:
 - linux
 - osx
 rvm:
+- 2.6
 - 2.5
 - 2.4
-- 2.3
 - ruby-head
-before_install:
-- gem install bundler -v 2.0.1
+before_install: 
+- gem install bundler -v "~> 2"
 - bundle update
 matrix:
   allow_failures:
     - rvm: ruby-head
-