fix(storybook): removes babel loose mode warning

Author: thawkin3

babel.config.js

@@ -17,7 +17,7 @@ module.exports = {
     production: {
       presets: [['@babel/preset-env', { modules: false }]],
     },
-    // For Storybook, which requires ES6 modules to be transpiled
+    // For Storybook
     storybook: {
       presets: [
         [
@@ -29,6 +29,9 @@ module.exports = {
           },
         ],
       ],
+      plugins: [
+        ['@babel/plugin-proposal-private-property-in-object', { loose: true }],
+      ],
     },
   },
 }

package.json

@@ -43,7 +43,7 @@
     "prettier": "prettier --write \"**/*.{js,jsx,ts,tsx,md}\"",
     "prettier-watch": "onchange \"**/*.{js,jsx,ts,tsx,md}\" -- prettier --write {{changed}}",
     "release": "standard-version",
-    "storybook": "start-storybook -p 9009",
+    "storybook": "NODE_ENV=storybook start-storybook -p 9009",
     "stylelint": "stylelint --fix \"src/**/*.css\"",
     "test": "NODE_ENV=test jest",
     "test:coverage": "NODE_ENV=test jest --coverage",