v3.5.0 fails building WorkBox v6.2.4

[AbelVM]

Describe the bug
Building fails with latest Workbox Core

> wmr build --prerender

Browserslist: caniuse-lite is outdated. Please run:
npx browserslist@latest --update-db

Why you should do it regularly:
https://github.com/browserslist/browserslist#browsers-data-updating

Error: Unexpected token (npm/[email protected]/_private/assert.js:72:32)

    at sb (/home/abel/Projects/PWA/node_modules/wmr/wmr.cjs:2:965070)
    at Object.transform (/home/abel/Projects/PWA/node_modules/wmr/wmr.cjs:2:2539015)
    at /home/abel/Projects/PWA/node_modules/wmr/wmr.cjs:2:337452
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)

To Reproduce
Just try to build a project that uses workbox 6.2.4

Expected behavior
Succesufl compiling

Bug occurs with:

• wmr or wmr start (development)
• wmr build (production)
• wmr serve

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• Browser: Chrome
• Node Version: 14.17.5
• WMR Version: 3.5.0
• WMR service-workers plugin: 0.3.0

Additional context
Add any other context about the problem here.

[developit]

Funky. The relevant line:

export { finalAssertExports as assert };

[marvinhagemeister]

Could be an issue with our acorn plugin for import assertions.

[AbelVM]

This issue looks related to #769

[JoviDeCroock]

Is there a minimal reproducible example we can leverage to fix this issue? 😅