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

Closes #36

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "ember-cli-deploy-build": "^1.1.1",
     "ember-cli-deploy-git": "^1.3.3",
     "ember-cli-deploy-git-ci": "^1.0.1",
-    "ember-cli-htmlbars": "^3.0.0",
+    "ember-cli-htmlbars": "^4.0.8",
     "ember-cli-htmlbars-inline-precompile": "^2.1.0",
     "ember-cli-inject-live-reload": "^2.0.1",
     "ember-cli-sass": "^10.0.0",