Drops elixir 1.2 and otp 17 support

sobolevn · sobolevn · commit 6c2cf0bed7af · 2017-06-11T20:09:34.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,12 +3,10 @@ language: elixir
 sudo: false
 
 elixir:
-  - 1.2
   - 1.3
   - 1.4
 
 otp_release:
-  - 17.4
   - 18.2
   - 19.3
 
