Merge pull request #1423 from storybooks/greenkeeper/lerna-2.0.0

Update lerna to the latest version 🚀

Author: ndelangen

package.json

@@ -57,7 +57,7 @@
     "husky": "^0.13.4",
     "jest": "^20.0.4",
     "jest-enzyme": "^3.2.0",
-    "lerna": "2.0.0-rc.5",
+    "lerna": "2.0.0",
     "lint-staged": "^4.0.0",
     "markdown-it-anchor": "^4.0.0",
     "markdownlint-cli": "^0.3.1",