Update .travis.yml

Yuki Ito · Yuki Ito · commit 80187bd65a19 · 2015-07-21T20:36:09.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,9 +2,9 @@ language: erlang
 notifications:
   email: false
 otp_release:
+  - 18.0
   - 17.4
   - 17.3
-  - 17.2
   - 17.1
   - 17.0
   - R16B03
