use the compat implementation

Author: Feiyang1

packages/firestore/compat/config.ts

@@ -24,10 +24,8 @@ import { Component, ComponentType } from '@firebase/component';
 import {
   FirebaseFirestore,
   CACHE_SIZE_UNLIMITED,
-  FieldPath,
   GeoPoint,
-  Timestamp,
-  FieldValue
+  Timestamp
 } from '../exp/index'; // import from the exp public API
 import { Blob } from '../src/api/blob';
 import {
@@ -43,6 +41,9 @@ import {
   setLogLevel
 } from '../src/api/database';
 
+import { FieldPath } from '../src/api/field_path';
+import { FieldValue } from '../src/api/field_value';
+
 const firestoreNamespace = {
   Firestore,
   GeoPoint,