stop running tests for symfony 3.0 which is EOL (#129)

Author: fbourigault

.travis.yml

@@ -16,8 +16,8 @@ env:
     global:
         - TEST_COMMAND="composer test"
     matrix:
+        - SYMFONY_VERSION=3.2.*
         - SYMFONY_VERSION=3.1.*
-        - SYMFONY_VERSION=3.0.*
         - SYMFONY_VERSION=2.8.*
         - SYMFONY_VERSION=2.7.*