Bug: Need to preserve code of keydown event

[nbonamy]

Describe the bug
When triggering a keydown, I need the code option to be preserved. For now it is overridden with keyCode at

test-utils/src/createDomEvent.ts

Line 113 in e96db6a

code: keyCode,

To Reproduce
await wrapper.find('input').trigger('keydown', { code: 'Space', key: ' ', keyCode: 32, ctrlKey: true })

Expected behavior
In event handler: event.code == 'Space'

I want submit a PR to change line 113 to code: options.code || keyCode,

Would that be valid?