Bump ember-styleguide

Author: sivakumar-kailasam

package.json

@@ -88,7 +88,7 @@
     "ember-route-action-helper": "^2.0.5",
     "ember-sinon": "^2.1.0",
     "ember-source": "~3.4.0",
-    "ember-styleguide": "ember-learn/ember-styleguide#66bd44f03a3dd629d926e4c0b99f9372c0851802",
+    "ember-styleguide": "4.0.0-13",
     "ember-svg-jar": "^1.2.2",
     "ember-test-selectors": "^2.0.0",
     "ember-tether": "1.0.0",