.travis.yml in validators-2.5.3 vs .travis.yml in validators-2.5.4

- old
+ new

@@ -1,12 +1,16 @@
 language: ruby
 cache: bundler
 sudo: false
-script: bundle exec rspec
+script: bundle exec rake
+notifications:
+  email: false
 rvm:
-- '2.2'
-- '2.1'
-- '2.0'
+  - '2.4.1'
+  - '2.3.0'
+  - '2.2.7'
 addons:
   code_climate:
     repo_token:
       secure: CX0AIDehELC1kcnvfeLLnhKpX68OCh7OhyRuFhJbMLt9NEu5FjLJgR3IF4V/e+BeyUIEi+xidi/Xa9j+06BbCGtjGmmgTde/Zp9qpVHOwsiGXYn4zkZZmudUQXdF/S3CrBkwauXC8HTUS1OIeGylK5fhW/fz+PpwU7ocQahrhvc=
+after_success:
+- bundle exec codeclimate-test-reporter