Describe the bug
When running yarn test:unit in a plugin using @wordpress/scripts I get errors like this:
Cannot find module 'core-js/modules/es.date.to-json' from 'Form.test.js' It is triggered by the first import in any test files.

I fixed it by adding @core-js after reading this: TryGhost/gatsby-starter-ghost#29 (comment)

To reproduce
Steps to reproduce the behavior:

1. Add a test
2. yarn test:unit
3. See error described above
4. See error

Expected behavior
This should not be required.

Desktop (please complete the following information):

• OS: Windows 10
• Version "@wordpress/scripts@3.3.0"
• Node v10.16.0

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]