Merge pull request #304 from ember-learn/update-ember-cli

update ember-cli to fix babel transpilation bug

Author: mansona

.node-version

@@ -0,0 +1 @@
+10

.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
-  - "8"
+  - "10"
 
 sudo: false
 dist: trusty