fix(Users): Makes sure verifying emails triggers hooks and liveQuery (#3851)

* Use RestWrite when verifying emails so hooks are called (as master)

* Fixes tests for postgres

* nit

* Makes rest.update support a full where instead of objectId

* Use rest.update to guaranteed proper beforeSave and liveQuery calls

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -58,7 +58,8 @@ const toPostgresValue = value => {
 }
 
 const transformValue = value => {
-  if (value.__type === 'Pointer') {
+  if (typeof value === 'object' &&
+        value.__type === 'Pointer') {
     return value.objectId;
   }
   return value;