chore(package): update lerna to version 3.2.1

Closes #18

Author: greenkeeper[bot]

package.json

@@ -19,7 +19,7 @@
     "eslint-plugin-flowtype": "^2.46.3",
     "eslint-plugin-import": "^2.11.0",
     "flow-bin": "^0.74.0",
-    "lerna": "^2.11.0",
+    "lerna": "^3.2.1",
     "prettier": "^1.12.1",
     "prettier-eslint": "^8.8.1"
   }