feat: added heroku image by default

Author: jdx

assets/heroku.png

@@ -0,0 +1,3 @@
+import {notify} from './src'
+
+notify({message: 'test'})

example.ts

@@ -24,6 +24,7 @@
     "node": ">=8.0.0"
   },
   "files": [
+    "/assets",
     "/lib"
   ],
   "homepage": "https://github.com/heroku/heroku-cli-notifications",

package.json

@@ -1,10 +1,14 @@
 import * as NodeNotifier from 'node-notifier'
+import * as path from 'path'
 
 export interface Notification extends NodeNotifier.Notification {
   force?: boolean
 }
 
 export function notify(notification: Notification = {}, callback?: NodeNotifier.NotificationCallback) {
-  if (!notification.force || ['0', 'false'].includes(process.env.HEROKU_NOTIFICATIONS!)) return
-  return NodeNotifier.notify(notification, callback)
+  if (!notification.force && ['0', 'false'].includes(process.env.HEROKU_NOTIFICATIONS!)) return
+  return NodeNotifier.notify({
+    icon: path.join(__dirname, '../assets/heroku.png'),
+    ...notification,
+  } as Notification, callback)
 }