Test with OTP releases 21.[0..3]

diff --git a/.travis.yml b/.travis.yml
index e0c4825..ce4aa59 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,10 @@ language:
     erlang
 
 otp_release:
+    - 21.3
+    - 21.2
+    - 21.1
+    - 21.0
     - 18.1
     - 18.0
     - 17.5