fix(performance): initializePerformance settings param is optional (#8385)

Author: MichaelVerdon

packages/perf/lib/modular/index.d.ts

@@ -39,12 +39,12 @@ type PerformanceSettings = {
 /**
  * Returns a Performance instance for the given app.
  * @param app - FirebaseApp. Required.
- * @param settings - PerformanceSettings. Set "dataCollectionEnabled" which will enable/disable Performance collection.
+ * @param settings - Optional PerformanceSettings. Set "dataCollectionEnabled" which will enable/disable Performance collection.
  * @returns {Promise<Performance>}
  */
 export function initializePerformance(
   app: FirebaseApp,
-  settings: PerformanceSettings,
+  settings?: PerformanceSettings,
 ): Promise<Performance>;
 
 /**

packages/perf/lib/modular/index.js

@@ -42,7 +42,7 @@ export function getPerformance(app) {
 /**
  * Returns a Performance instance for the given app.
  * @param app - FirebaseApp. Required.
- * @param settings - PerformanceSettings. Set "dataCollectionEnabled" which will enable/disable Performance collection.
+ * @param settings - Optional PerformanceSettings. Set "dataCollectionEnabled" which will enable/disable Performance collection.
  * @returns {Performance}
  */
 export async function initializePerformance(app, settings) {