fix(package): update ember-cli-htmlbars to version 4.0.2

Closes #43

Author: greenkeeper[bot]

package.json

@@ -81,7 +81,7 @@
     "broccoli-plugin": "^1.3.0",
     "deep-extend": "^0.6.0",
     "ember-cli-babel": "^7.1.2",
-    "ember-cli-htmlbars": "^3.0.0",
+    "ember-cli-htmlbars": "^4.0.2",
     "fs-extra": "^7.0.1",
     "html-postcss": "^0.1.2",
     "parse5": "^5.1.0",