add UPDATE script

BoleynSu · BoleynSu · commit d666e9a59b24 · 2020-11-23T02:43:59.000+09:00
diff --git a/UPDATE b/UPDATE
@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+cd $(dirname $BASH_SOURCE)
+
+git remote add upstream https://github.com/littlecodersh/ItChat.git
+git pull upstream master --no-edit
