dev.yml in cli-kit-3.3.0 vs dev.yml in cli-kit-4.0.0

@@ -1,6 +1,6 @@
 up:
-  - ruby: 2.3.3
+  - ruby: 2.7.0
   - bundler
 
 commands:
   test: bin/testunit
   style: "bundle exec rubocop -D"