Update dependency ember-cli-htmlbars to v5.6.3

Author: renovate-bot

package.json

@@ -49,7 +49,7 @@
 		"ember-cli-babel": "7.23.1",
 		"ember-cli-build-notifications": "0.4.0",
 		"ember-cli-fastclick": "1.5.0",
-		"ember-cli-htmlbars": "5.6.2",
+		"ember-cli-htmlbars": "5.6.3",
 		"ember-cli-moment-shim": "3.8.0",
 		"ember-cli-notifications": "6.3.2",
 		"ember-cli-pushjs": "2.0.8",