Test against multiple Elixir versions

Author: ankhers

.travis.yml

@@ -6,11 +6,9 @@ cache:
       - ~/.mongodb
 
 elixir:
-  - 1.2
   - 1.3
-
-otp_release:
-  - 18.1
+  - 1.4
+  - 1.5
 
 before_install:
   - . $HOME/.nvm/nvm.sh
@@ -46,7 +44,3 @@ env:
     - MONGOVERSION=2.6.12
     - MONGOVERSION=3.0.12
     - MONGOVERSION=3.2.10
-
-notifications:
-  recipients:
-    - michal@muskala.eu