Issue description

After upgrading to 4.6.1 from 4.5.0, I'm seeing the following warning message when running my tests in Jest:

    console.error node_modules/reactstrap/dist/reactstrap.min.js:1
      Warning: It looks like you\'re using a minified copy of the development build of React. When deploying React apps to production, make sure to use the production build which skips development warnings and is faster. See https://fb.me/react-minification for more details.

I get this simply by importing Button (or other components) from reactstrap, even without actually using it in my JSX code.

Related changes I made on my end is to use react-transition-group and no longer react-addons-css-transition-group and react-addons-transition-group.

Was there a built related change that might've caused this?

• version #4.6.1
• components: Button

Steps to reproduce issue

• Upgrade to 4.6.1.
• import a component like Button.