Fix travis to run npm test and not ember try

.travis.yml

@@ -1,6 +1,7 @@
 ---
 language: node_js
 node_js:
+  - "0.12"
   - "4"
 
 sudo: false
@@ -10,18 +11,8 @@ cache:
     - $HOME/.npm
     - $HOME/.cache # includes bowers cache
 
-env:
-  # we recommend testing LTS's and latest stable release (bonus points to beta/canary)
-  - EMBER_TRY_SCENARIO=ember-lts-2.4
-  - EMBER_TRY_SCENARIO=ember-lts-2.8
-  - EMBER_TRY_SCENARIO=ember-release
-  - EMBER_TRY_SCENARIO=ember-beta
-  - EMBER_TRY_SCENARIO=ember-canary
-
 matrix:
   fast_finish: true
-  allow_failures:
-    - env: EMBER_TRY_SCENARIO=ember-canary
 
 before_install:
   - npm config set spin false
@@ -35,6 +26,4 @@ install:
   - bower install
 
 script:
-  # Usually, it's ok to finish the test scenario without reverting
-  #  to the addon's original dependency state, skipping "cleanup".
-  - ember try:one $EMBER_TRY_SCENARIO test --skip-cleanup
+  - npm test