chore: update devdependency @vueuse/head to v1

[wattanx]

🔗 Linked issue

#708

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Updating @vueuse/head to v1 requires unhead transpile.
(This is because unhead uses optional chaining.)

The error you are getting with iron-webcrypto is not related to @vueuse/head, so we have not fixed it.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[wattanx]

Thank you for the merge!
@nuxt/[email protected] did not seem to include this fix yet.
I will close the Issue once this fix is included and confirmed.