Issue #190, polyfills build error fix

Author: chriscoombs

MultiRegion/2_UI/package.json

@@ -24,7 +24,7 @@
     "@swimlane/ngx-datatable": "^13.1.0",
     "aws-amplify": "^1.0.11",
     "aws-amplify-angular": "^2.0.3",
-    "core-js": "*",
+    "core-js": "^2.6.11",
     "eslint": "^5.5.0",
     "ng-bootstrap": "*",
     "ngx-facebook": "*",

MultiRegion/2_UI/tsconfig.json

@@ -16,6 +16,7 @@
       "es2017",
       "dom"
     ],
-    "module": "es2015"
+    "module": "es2015",
+    "skipLibCheck": true
   }
 }