extension package.json contains outdated dependency value (#320) (#321)

Author: bkendall

firestore-bigquery-export/package.json

@@ -22,7 +22,7 @@
     "chai": "^4.2.0",
     "firebase-admin": "^7.1.1",
     "firebase-functions": "^2.2.1",
-    "@firebaseextensions/firestore-bigquery-change-tracker": "file:./firestore-bigquery-change-tracker",
+    "@firebaseextensions/firestore-bigquery-change-tracker": "^0.1.2",
     "lodash": "^4.17.14",
     "mocha": "^5.0.5",
     "nyc": "^14.0.0",