.travis.yml in mistral_client-1.3.0 vs .travis.yml in mistral_client-2.0.0

@@ -1,11 +1,11 @@
 language: ruby
 cache: bundler
 rvm:
-  - 2.3.8
-  - 2.4.10
   - 2.5.8
   - 2.6.6
+  - 2.7.2
+  - 3.0.0
 before_install:
   - gem install bundler
 branches:
   only:
     - master