chore(package): update ember-data to version 3.15.1

Closes #79

Author: greenkeeper[bot]

package.json

@@ -90,7 +90,7 @@
     "ember-cli-sri": "^2.1.0",
     "ember-cli-test-loader": "^1.1.0",
     "ember-cli-uglify": "^1.2.0",
-    "ember-data": "^2.10.0",
+    "ember-data": "^3.15.1",
     "ember-disable-prototype-extensions": "^1.1.0",
     "ember-export-application-global": "^1.0.5",
     "ember-hook": "1.4.1",