Upgrade adapters esbuild to latest

[haishanh]

The esbuild version of Vercel, Netlify, and Cloudflare Workers adapter has been ^0.11.18 for a while. It's been upgraded to ^0.12.5 in this PR.

Personally I'm using prisma 2 in my SvelteKit app on Vercel. Prisma client depends on the module undici which in turn depends on a Node internal module called _http_common. Since this node internal module was not in esbuild's Node internal module list, svelte-kit build failed due to esbuild not able to resolve _http_common. This is fixed in esbuild 0.12.1.

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[benmccann]

lgtm. esbuild for vite was upgraded to 0.12.5 here: #1625