fix: update pushbullet import to match package (jef#637)

Author: zinefer

src/notification/pushbullet.ts

@@ -1,6 +1,6 @@
 import {Link, Store} from '../store/model';
 import {Print, logger} from '../logger';
-import PushBullet from '@hijef/pushbullet';
+import PushBullet from '@jef/pushbullet';
 import {config} from '../config';
 
 const pushbullet = config.notifications.pushbullet;

src/types/pushbullet.d.ts

@@ -1,4 +1,4 @@
-declare module '@hijef/pushbullet' {
+declare module '@jef/pushbullet' {
 	export type DeviceParams = string | number | Record<string, any>;
 
 	export type PushBulletCallback = ((error: Error) => void) | ((error?: null, response: any) => void);