fix(google-maps): mark peer dependency as optional

[danshilm]

🔗 Linked issue

Resolves #536

❓ 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)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This marks the dependency @googlemaps/markerclusterer introduced in PR #510 as an optional peer dependency so that it is not installed when installing @nuxt/scripts >= v0.12.0

[vercel]

@danshilm is attempting to deploy a commit to the Nuxt Team on Vercel.

A member of the Team first needs to authorize it.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/nuxt/scripts/@nuxt/scripts@537

commit: f2816dc

[harlan-zw]

Thanks!