Add Travis builds for OTP 18.0 and 18.1

diff --git a/.travis.yml b/.travis.yml
index 068c3a3..e0c4825 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,8 @@ language:
     erlang
 
 otp_release:
     erlang
 
 otp_release:

+    - 18.1
+    - 18.0

     - 17.5
     - 17.0
 
     - 17.5
     - 17.0