chore(deps): update storybook monorepo to v3.4.12

Author: renovate-bot

package.json

@@ -32,12 +32,12 @@
     "@babel/core": "7.0.0-beta.42",
     "@babel/node": "7.0.0-beta.42",
     "@babel/preset-env": "7.0.0-beta.42",
-    "@storybook/addon-actions": "3.3.15",
-    "@storybook/addon-info": "3.3.15",
-    "@storybook/addon-links": "3.3.15",
-    "@storybook/addon-options": "3.3.15",
-    "@storybook/addon-storyshots": "3.3.15",
-    "@storybook/react": "3.3.15",
+    "@storybook/addon-actions": "3.4.12",
+    "@storybook/addon-info": "3.4.12",
+    "@storybook/addon-links": "3.4.12",
+    "@storybook/addon-options": "3.4.12",
+    "@storybook/addon-storyshots": "3.4.12",
+    "@storybook/react": "3.4.12",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "8.2.2",
     "babel-jest": "22.4.1",