showdown@1.0.0-alpha1 vulnerabilities

A Markdown to HTML converter written in Javascript

Known vulnerabilities in the showdown package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability	Vulnerable Version
L Reverse Tabnabbing showdown is a JavaScript Markdown to HTML converter. Affected versions of this package are vulnerable to Reverse Tabnabbing. due to the usage of `target="_blank"` without also adding `rel="noopener noreferrer"`. How to fix Reverse Tabnabbing? Upgrade `showdown` to version 1.9.1 or higher.	<1.9.1