update travis config

.travis.yml

@@ -1,23 +1,25 @@
 ---
 language: node_js
 node_js:
-  - "4"
+  - "6"
 
 sudo: false
 
 cache:
   directories:
-    - node_modules
+    - $HOME/.npm
+    - $HOME/.cache # includes bowers cache
 
 env:
   global:
   - ENCRYPTION_LABEL: "1e7ab1c5e7e3"
   - COMMIT_AUTHOR_EMAIL: "steven.heinrich@gmail.com"
-  - EMBER_TRY_SCENARIO=default
+  matrix:
   - EMBER_TRY_SCENARIO=ember-1.13
   - EMBER_TRY_SCENARIO=ember-release
   - EMBER_TRY_SCENARIO=ember-beta
-  # - EMBER_TRY_SCENARIO=ember-canary
+  - EMBER_TRY_SCENARIO=ember-canary
+  - EMBER_TRY_SCENARIO=default
 
 matrix:
   fast_finish: true
@@ -26,10 +28,9 @@ matrix:
 
 before_install:
   - npm config set spin false
-  - npm install -g bower
+  - npm install -g bower phantomjs-prebuilt
   - bower --version
-  - npm install phantomjs-prebuilt
-  - node_modules/phantomjs-prebuilt/bin/phantomjs --version
+  - phantomjs --version
 
 install:
   - npm install
@@ -41,5 +42,5 @@ before_script:
 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
+  - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO test --skip-cleanup
   - ./deploy.sh