.travis.yml in oddb2xml-2.6.6 vs .travis.yml in oddb2xml-2.6.7

@@ -9,20 +9,19 @@
   - gem --version
 
 script: bundle exec rspec
 
 rvm:
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
-  - 2.5.0
+  # Building on Versions 2.4 or earlier of Ruby fail, because URI.open was priveate
+  # - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
   - ruby-head
 
 matrix:
   allow_failures:
     - rvm: ruby-head
-    - rvm: 2.2.7
-    - rvm: 2.3.4
 
 notifications:
   email:
     recipients:
       - [e-mail]