Version on webcomponents.org is 1.1.1?
Also, the description talks about server-side timing whereas code certainly seems to be computing client-side…
This add-on’s version is currently independent from the one of the web component, and due to an issue with WebJars at the time, the WebJars maven dependency became 1.1.1-1.
The web component does have client-side code, but this add on has its own server-side timer implementation, i.e. it does not care about what time the client side reports.