From 07a97b7b87977de5e269cb5e670b51a99e151110 Mon Sep 17 00:00:00 2001
From: Cheerego <35982308+shanyi15@users.noreply.github.com>
Date: Fri, 21 Jun 2019 16:12:14 +0800
Subject: [PATCH] fix_travis_0621 (#910)

---
 external/book | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/book b/external/book
index ffcf5e451..db95d2256 160000
--- a/external/book
+++ b/external/book
@@ -1 +1 @@
-Subproject commit ffcf5e451e3830dfec33061295f8705c4bc43a9d
+Subproject commit db95d22564bd94d4beaf4439f7c9b456e7510c6b
-- 
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