fix(package): update core-js to version 3.1.1

greenkeeper[bot] · greenkeeper[bot] · commit 82ac3305ebc7 · 2019-05-20T20:44:30.000Z
Closes #43
diff --git a/package.json b/package.json
@@ -22,7 +22,7 @@
     "@angular/platform-browser-dynamic": "^5.0.2",
     "@angular/router": "^5.0.2",
     "bootstrap": "^3.3.7",
-    "core-js": "^2.4.1",
+    "core-js": "^3.1.1",
     "rxjs": "^5.4.1",
     "zone.js": "^0.8.14"
   },
