chore(package): update ember-lifeline to version 3.1.1

Closes #55

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "ember-concurrency": "^0.8.12",
     "ember-data": "~2.18.0",
     "ember-export-application-global": "^2.0.0",
-    "ember-lifeline": "^2.0.0",
+    "ember-lifeline": "^3.1.1",
     "ember-load-initializers": "^1.0.0",
     "ember-moment": "^7.4.1",
     "ember-power-calendar": "^0.7.1",