From 0a3ab5f4213d2b7b981f43db13de1b33b5bf37ce Mon Sep 17 00:00:00 2001
From: Koichi ITO <koic.ito@gmail.com>
Date: Mon, 10 Apr 2017 00:48:17 +0900
Subject: [PATCH] CI against Ruby 2.2, 2.3, and 2.4

Follow up to #172.
---
 .travis.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 1cf369ee..184c54c7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,9 @@ rvm:
   - 1.9.3
   - 2.0.0
   - 2.1
+  - 2.2
+  - 2.3
+  - 2.4.1
   - rbx-2
   - ree
   - ruby-head