Merge pull request #61 from astronomersiva/fix-ci

Try and fix CI

.travis.yml

@@ -3,7 +3,7 @@ language: node_js
 node_js:
   # we recommend testing addons with the same minimum supported node version as Ember CLI
   # so that your addon works for all apps
-  - "6"
+  - "8"
 
 sudo: false
 dist: trusty
@@ -41,22 +41,16 @@ jobs:
         - npm run lint:hbs
         - npm run lint:js
         - npm test
+        - npm run build -- -prod
 
     # we recommend new addons test the current and previous LTS
     # as well as latest stable release (bonus points to beta/canary)
     - stage: "Additional Tests"
-      env: EMBER_TRY_SCENARIO=ember-lts-2.16
-    - env: EMBER_TRY_SCENARIO=ember-lts-2.18
+      env: EMBER_TRY_SCENARIO=ember-lts-2.18
     - env: EMBER_TRY_SCENARIO=ember-lts-3.4
     - env: EMBER_TRY_SCENARIO=ember-release
     - env: EMBER_TRY_SCENARIO=ember-beta
     - env: EMBER_TRY_SCENARIO=ember-canary
     - env: EMBER_TRY_SCENARIO=ember-default-with-jquery
-
-before_install:
-  - npm config set spin false
-  - npm install -g npm@4
-  - npm --version
-
-script:
-  - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO
+      script:
+        - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO