chore(package): update ember-cli-sass to version 9.0.1

Closes #13

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "ember-cli-inject-live-reload": "^1.4.1",
     "ember-cli-qunit": "^4.1.1",
     "ember-cli-release": "^1.0.0-beta.2",
-    "ember-cli-sass": "^7.1.4",
+    "ember-cli-sass": "^9.0.1",
     "ember-cli-shims": "^1.2.0",
     "ember-cli-sri": "^2.1.0",
     "ember-cli-uglify": "^2.0.0",