This repository is now being hosted at the official @capacitor-community. No worries, the only thing that's changed is the name. So updating to that version is easy. (It really is.)
Just run the following commands:
npm uninstall @dutchconcepts/capacitor-barcode-scanner
npm install @capacitor-community/barcode-scanner
npx cap syncThat's it
See also the release notes in the new repository.