Support extendRef() with Vue 2.7

[posva]

Clear and concise description of the problem

@vue/composition-api has a limitation that prevents extendRef() to be used but this is not the case for Vue 2.7

Suggested solution

I think vue-demi could expose a variable isNativeCompositionAPI or similar.

Even without that, using import { version } from 'vue' should work in most cases to check if it's vue >= 2.7 and allow using extendRef().

Alternative

No response

Additional context

• extendRef won't work with Vue2 refs #280

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[posva]

up

[antfu]

Making sense, implemented. isNativeCompositionAPI might be a good idea, but I feel vue-demi is already a bit overwhelming. Since we can have the info via version, let's use it for now.