Refresh component after lefttime update

[jma-9code]

Bug Report or Feature Request (mark with an x)

[ ] Bug report -> please search issues before submitting
[X ] Feature request
[ ] Documentation issue or request

Current behavior

Update config.lefttime, component not refreshed

Expected behavior

Update config.lefttime, component updated

Environment

Angular version: 6.0.0
ngx-countdown version: latest
Browser:
- [ X] Chrome (desktop) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] IE version XX

Others:

[cipchk]

Yes.

A temporary solution changed time value via config parameter.

[jma-9code]

If you change the config.lefttime parameter, you need to refresh the page to see the new value applied.

[cipchk]

Please try to reproduce via https://stackblitz.com/edit/ngx-countdown-setup, thanks!

[jma-9code]

https://stackblitz.com/edit/ngx-countdown-setup-fuu7r7

[cipchk]

A working demo