Use lerna

Author: schmidt-sebastian

integration/firestore/package.json

@@ -1,9 +1,9 @@
 {
   "name": "firebase-firestore-integration-test",
   "version": "1.0.1",
-  "private": true,
+  "private": true, 
   "scripts": {
-    "build:deps": "cd ../../packages/firestore ; yarn build",
+    "build:deps": "lerna run --scope @firebase/'{app,firestore}' --include-dependencies build",
     "build:persistence": "INCLUDE_FIRESTORE_PERSISTENCE=true gulp compile-tests",
     "build:memory": "INCLUDE_FIRESTORE_PERSISTENCE=false gulp compile-tests",
     "test": "yarn build:memory; karma start --single-run; yarn build:persistence; karma start --single-run;",