ci(peer-deps): re-enabled the check for dev-dependencies

now that v6 of eslint is officially supported by the airbnb config

Author: travi

.travis.yml

@@ -5,7 +5,7 @@ branches:
   except:
     - /^v\d+\.\d+\.\d+(-(alpha|beta)\.\d+(@(alpha|beta))?)?$/
 before_script:
-  - npm ls --production >/dev/null
+  - npm ls >/dev/null
 deploy:
   provider: script
   skip_cleanup: true