fix(package): update angulartics2 to version 8.1.0

Closes #39

Author: greenkeeper[bot]

demo/package.json

@@ -43,7 +43,7 @@
     "@angular/service-worker": "7.2.5",
     "@ng-bootstrap/ng-bootstrap": "^4.1.0",
     "@stackblitz/sdk": "^1.2.0",
-    "angulartics2": "^7.2.3",
+    "angulartics2": "^8.1.0",
     "bootstrap": "^4.1.3",
     "core-js": "^2.6.0",
     "font-awesome": "^4.7.0",