refactor: ie10 MutationObserver polyfill

Author: xidedix

package-lock.json

@@ -32,6 +32,7 @@
     "flag-icon-css": "3.0.0",
     "font-awesome": "^4.7.0",
     "moment": "2.22.1",
+    "mutationobserver-shim": "^0.3.2",
     "ng2-charts": "1.6.0",
     "ngx-bootstrap": "2.0.4",
     "ngx-perfect-scrollbar": "5.3.5",

package.json

@@ -45,6 +45,8 @@ import 'core-js/es6/reflect';
 // Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
 import 'core-js/es7/reflect';
 
+// for IE10
+import 'mutationobserver-shim'
 
 /**
  * Required to support Web Animations `@angular/platform-browser/animations`.