Fix typings

index.d.ts

@@ -37,6 +37,7 @@ declare module "react-native-fcm" {
         local_notification?: boolean;
         _notificationType: string;
         finish(type?: string): void;
+        [key: string]: any;
     }
 
     export interface LocalNotification {
@@ -59,12 +60,12 @@ declare module "react-native-fcm" {
         auto_cancel?: boolean;
         group?: string;
         picture?: string;
-        my_custom_data?: string;
         ongoing?: boolean;
         lights?: boolean;
+        [key: string]: any;
     }
 
-    export interface ScheduleLocalNotification extends LocalNotification{
+    export interface ScheduleLocalNotification extends LocalNotification {
         id: string;
         fire_date: number;
         repeat_interval?: "week" | "day" | "hour"