last 2 otp versions

Igor Kapkov · Igor Kapkov · commit 3165e395547e · 2017-07-16T20:41:39.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,9 @@ sudo: false
 elixir:
   - 1.3.4
   - 1.4.5
+otp_release:
+  - 19.3
+  - 20
 before_script:
   - kerl list installations
 script:
