chore(package): update ember-cli-babel to version 7.4.3

Closes #23

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "ember-bootstrap-datetimepicker": "1.1.0",
     "ember-cli": "^2.11.0",
     "ember-cli-app-version": "^3.1.3",
-    "ember-cli-babel": "^6.11.0",
+    "ember-cli-babel": "^7.4.3",
     "ember-cli-dependency-checker": "^2.1.0",
     "ember-cli-deploy": "1.0.2",
     "ember-cli-deploy-build": "1.1.1",