chore(package): update ember-cli-htmlbars to version 5.1.1

Closes #69

Author: greenkeeper[bot]

package.json

@@ -57,7 +57,7 @@
     "ember-cli-chai": "^0.5.0",
     "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-eslint": "^5.1.0",
-    "ember-cli-htmlbars": "^3.0.1",
+    "ember-cli-htmlbars": "^5.1.1",
     "ember-cli-htmlbars-inline-precompile": "^2.1.0",
     "ember-cli-inject-live-reload": "^2.0.1",
     "ember-cli-sri": "^2.1.1",