[FSSDK-11197] EventTags type fix v5

Author: junaed-optimizely

lib/shared_types.ts

@@ -73,7 +73,13 @@ export interface UserProfile {
   experiment_bucket_map: ExperimentBucketMap;
 }
 
-export type EventTags =  Record<string, unknown>;
+export type EventTags = {
+  revenue?: string | number | null;
+  value?: string | number | null;
+  $opt_event_properties?: Record<string, unknown>;
+  [key: string]: unknown;
+};
+
 export interface UserProfileService {
   lookup(userId: string): UserProfile;
   save(profile: UserProfile): void;