chore(package): update ember-cli-htmlbars to version 4.0.8

Closes #16

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "ember-cli-babel": "^5.1.7",
     "ember-cli-dependency-checker": "^1.3.0",
     "ember-cli-dotenv": "1.2.0",
-    "ember-cli-htmlbars": "^1.0.10",
+    "ember-cli-htmlbars": "^4.0.8",
     "ember-cli-htmlbars-inline-precompile": "^0.3.3",
     "ember-cli-inject-live-reload": "^1.4.1",
     "ember-cli-jshint": "^2.0.1",