add storybook/addon-actions

.storybook/addons.js

 import '@storybook/addon-options/register';
+import '@storybook/addon-actions/register';

.storybook/config.js

@@ -7,7 +7,7 @@ import CssJail from '../src/CssJail';
 setTimeout(() => setOptions({
   name: '💎 PARAGON',
   url: 'https://github.com/edx/paragon',
-  showDownPanel: false,
+  showDownPanel: true,
 }), 1000);
 
 const req = require.context('../src', true, /\.stories\.jsx$/);

package.json

@@ -24,6 +24,7 @@
     "react-dom": "^15.5.4"
   },
   "devDependencies": {
+    "@storybook/addon-actions": "^3.2.12",
     "@storybook/addon-options": "^3.2.6",
     "@storybook/addon-storyshots": "^3.2.8",
     "@storybook/react": "3.2.8",