From ebfe55e63738fa41e55ac986ccae5e5f9bc3afbd Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Mon, 16 Dec 2019 15:14:34 +0900
Subject: [PATCH] travis: Use build config validation.

---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 39db1d7..7af7beb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,4 @@
+version: ~> 1.0
 dist: xenial
 language: python
 cache: pip