bootstrap 4.2.1 toast delay does not 'restart' if the toast is shown again before the timeout ends

Created by: karimcambridge

The title explains it well.

    clearTimeout(this._timeout)
}

The code above should be added in show() for the toast class at https://github.com/twbs/bootstrap/blob/9e4e94747bd698f4f61d48ed54c9c6d4d199bd32/js/src/toast.js#L80

• Windows 10.0.17763 Build 17763
• Version 71.0.3578.98 (Official Build) (64-bit)

Don't think there is need for a test case.