chore(package): update ember-exam to version 0.8.1

Closes #1410

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "ember-deferred-content": "0.2.0",
     "ember-disable-proxy-controllers": "^1.0.1",
     "ember-dragula": "1.9.3",
-    "ember-exam": "0.7.2",
+    "ember-exam": "0.8.1",
     "ember-export-application-global": "^2.0.0",
     "ember-i18n": "^5.0.2",
     "ember-keyboard": "^2.1.9",