.travis.yml in rubyntlm-0.6.2 vs .travis.yml in rubyntlm-0.6.3

@@ -1,10 +1,10 @@
 language: ruby
 rvm:
   - 2.1.9
-  - 2.2.0
-  - 2.3.1
-  - 2.4.0
+  - 2.6.6
+  - 2.7.1
+  - 3.0.0
 before_install:
   - gem update bundler
 
 # This prevents testing branches that are created just for PRs
 branches: