.travis.yml in henkei-2.2.1.1 vs .travis.yml in henkei-2.2.1.2

@@ -5,13 +5,13 @@
     - INCLUDE_RAILS=false
     - INCLUDE_RAILS=true
 
 language: ruby
 rvm:
-  - 2.5
   - 2.6
   - 2.7
   - 3.0
+  - 3.1
 
 before_install:
   - gem update bundler
 
 install: