message: fix(aio): add missing WeakMap polyfill
diff: @@ -11,6 +11,7 @@ import 'core-js/es6/date';
  import 'core-js/es6/array';
  import 'core-js/es6/regexp';
  import 'core-js/es6/map';
  +import 'core-js/es6/weak-map';
  import 'core-js/es6/set';
  /** IE10 and IE11 requires the following for NgClass support on SVG elements */
  