Sapper import issue

[JohnRSim]

When trying to use with sapper I'm getting the following error.

\node_modules\svelte-gantt\index.js:1
import moment, { duration } from 'moment';
^^^^^^

SyntaxError: Cannot use import statement outside a module

[JohnRSim]

used within the onmount resolved -

const { SvelteGantt, SvelteGanttDependencies, SvelteGanttExternal, SvelteGanttTable } = await import('svelte-gantt');