Errors when updating. Webpack related

I haven't had this error until I updated. What loader do I use with dayjs now?

WARNING in ./node_modules/dayjs/locale/types.d.ts 1:8
Module parse failed: Unexpected token (1:8)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> declare interface ILocale {
| name: string
| weekdays?: string[]
@ ./node_modules/dayjs/locale lazy ^\.\/.*$ namespace object ./types.d.ts
@ ./src/index.js