click on option in tag-input-dropdown and separate chips using ENTER, gives runtime error

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Current behavior

1.when trying to add a new chip by 'Enter', it is not happening, and gives a runtime error as following=> ReferenceError: regeneratorRuntime is not defined at TagInputComponent.onFormSubmit

(when i specify [separatorKeyCodes] for other keys, it works. but even if i specify [separatorKeyCodes]="[13]" it produces the same outcome as above)

2.when selecting an item from tag-input-dropdown gives runtime error ReferenceError: regeneratorRuntime is not defined at TagInputDropdown.requestAdding

Expected behavior

1.should be able to use 'enter' to add new chip 2.dropdown selection should work.

Minimal reproduction of the problem with instructions (if applicable)

<tag-input [ngModel]="['@item']" (onAdd)="onAdded($event)">
                <tag-input-dropdown [autocompleteItems]="['iTem1', 'item2', 'item3']" [focusFirstElement]="true"
                    [showDropdownIfEmpty]="true" [dynamicUpdate]="true" [appendToBody]="false">
                </tag-input-dropdown>
            </tag-input>

What do you use to build your app?. Please specify the version "@angular/cli": "~8.3.20",

Angular version:

"@angular/animations": "~8.2.14", "@angular/cdk": "^8.0.1", "@angular/common": "~8.2.14", "@angular/compiler": "~8.2.14", "@angular/core": "~8.2.14", "@angular/forms": "~8.2.14", "@angular/material": "^8.0.2", "@angular/platform-browser": "~8.2.14",

ngx-chips version: "ngx-chips": "^2.1.0",

Chrome

Gbuomprisco / ngx-chips

click on option in tag-input-dropdown and separate chips using ENTER, gives runtime error #947