add travel code notify

line_notifier.py

@@ -0,0 +1,16 @@
+import requests
+import os
+
+
+class LineNotifier:
+    def __init__(self) -> None:
+        self.url = 'https://notify-api.line.me/api/notify'
+        self.headers = {
+            'Authorization': 'Bearer ' + os.environ['LINE_TOKEN']
+        }
+
+    def notify(self, msg: str):
+        data = {
+            'message': msg,
+        }
+        requests.post(self.url, headers=self.headers, data=data)