Address PR feedback

Author: tohhsinpei

.changeset/empty-doors-brush.md

@@ -0,0 +1,5 @@
+---
+'@firebase/database': patch
+---
+
+Use new wire protocol parameters for startAfter, endBefore.

scripts/emulator-testing/emulators/database-emulator.ts

@@ -21,16 +21,18 @@ import { Emulator } from './emulator';
 
 importrulesJSONfrom'../../../config/database.rules.json';
 
+constDATABASE_EMULATOR_VERSION='4.11.0';
+
 exportclassDatabaseEmulatorextendsEmulator{
 namespace: string;
 
 constructor(port=8088,namespace='test-emulator'){
 super(
-'firebase-database-emulator-v4.11.0.jar',
+`firebase-database-emulator-v${DATABASE_EMULATOR_VERSION}.jar`,
 // Use locked version of emulator for test to be deterministic.
 // The latest version can be found from database emulator doc:
 // https://firebase.google.com/docs/database/security/test-rules-emulator
-'https://storage.googleapis.com/firebase-preview-drop/emulator/firebase-database-emulator-v4.11.0.jar',
+`https://storage.googleapis.com/firebase-preview-drop/emulator/firebase-database-emulator-v${DATABASE_EMULATOR_VERSION}.jar`,
 port
 );
 this.namespace=namespace;