chore(package): update ember-cli-htmlbars to version 4.0.9

Closes #41

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "ember-cli": "~3.9.0",
     "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-eslint": "^5.1.0",
-    "ember-cli-htmlbars": "^3.0.1",
+    "ember-cli-htmlbars": "^4.0.9",
     "ember-cli-htmlbars-inline-precompile": "^2.1.0",
     "ember-cli-inject-live-reload": "^2.0.1",
     "ember-cli-release": "^1.0.0-beta.2",