NbToastrService: Notifications can't be closed in Firefox and Internet Explorer

[minextu]

Issue type

I'm submitting a ... (check one with "x")

• bug report
• feature request

Issue description

Current behavior:

Notifications created using NbToastrService won't hide in Firefox and Internet Explorer 11.
It's working fine in Chrome.

Expected behavior:

The notification closes when you click on it or the timeout expires.

Steps to reproduce:

Show a notification using NbToasterService with default options in Firefox or Internet Explorer 11 and try to close it.

Can also be reproduced in the documentation: https://akveo.github.io/nebular/example/toastr/toastr-showcase.component

Other information:

Browser

Browser: Firefox 62, Internet Explorer 11

Nebular

nebular: 2.0.1

[Tibing]

Hi all, the bug has to be resolved after the PR will be merged. If it will not work properly try to uncomment // import 'web-animations-js';. in your polyfills.ts

[codinronan]

@Tibing any way this can be merged into the 2.x version as 2.0.3 or something? I would like to incorporate this fix but can't upgrade to Angular 7 for now...