new travis matrix

.travis.yml

@@ -2,5 +2,8 @@ language: bash
 sudo: required
 services:
   - docker
-install: docker pull heroku/cedar:14
-script: make test
+# install: docker pull heroku/cedar:14
+script: ./tests.sh
+env:
+  - STACK=heroku-16
+  - STACK=cedar-14
\ No newline at end of file

tests.sh

+#!/usr/bin/env sh
+
+if [[ ! "$STACK" ]]; then
+    echo '$STACK must be set! (heroku-16 | cedar-14)'
+    exit 1
+fi
+
+if [[ "$STACK" == "cedar-14" ]]; then
+    make test-cedar-14
+    exit $?
+fi
+
+if [[ "$STACK" == "heroku-16" ]]; then
+    make test-heroku-16
+    exit $?
+fi
\ No newline at end of file