Proper environment version setting

.travis.yml

@@ -6,12 +6,12 @@ script: "script/cibuild"
 
 matrix:
   include:
-    # Build with latest ruby
-    - rvm: 2.5
-      env: RUBOCOP_TEST="true" RSPEC_TEST="true" PUPPET_VERSIONS="5.0.0"
     # Puppet supports ruby 2.4 with Puppet >= 5.0 so this should be considered the "official" build
     - rvm: 2.4
-      env: RUBOCOP_TEST="false" RSPEC_TEST="true" ENFORCE_COVERAGE="true" PUPPET_VERSIONS="5.0.0"
+      env: RUBOCOP_TEST="true" RSPEC_TEST="true" PUPPET_VERSIONS="5.4.0" ENFORCE_COVERAGE="true"
+    # Build with latest ruby
+    - rvm: 2.5
+      env: RUBOCOP_TEST="false" RSPEC_TEST="true" PUPPET_VERSIONS="5.4.0"
     # Puppet supports ruby 2.0 and 2.1 with Puppet 4.x, but build with more recent versions too
     - rvm: 2.3
       env: RUBOCOP_TEST="false" RSPEC_TEST="true" PUPPET_VERSIONS="4.10.10"