fix(remix-server-runtime): make serializeError a synchronous function

[xuchaobei]

Error occurred in streaming SSR cannot be serialized correctly, since serializeError return a Promise. I suppose serializeError can just be a sync function.

https://github.com/remix-run/remix/blob/main/packages/remix-server-runtime/responses.ts#L209

Closes: #

• Docs
• Tests

Testing Strategy:

I opened up my mac machine and ran this script:

 npx create-remix@0.0.0-experimental-7e420ee3 --template remix my-test
 cd my-test
 npm run dev

[changeset-bot]

🦋 Changeset detected

Latest commit: bb72154

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 18 packages

Name	Type
@remix-run/server-runtime	Patch
@remix-run/cloudflare	Patch
@remix-run/deno	Patch
@remix-run/dev	Patch
@remix-run/node	Patch
@remix-run/react	Patch
@remix-run/cloudflare-pages	Patch
@remix-run/cloudflare-workers	Patch
create-remix	Patch
@remix-run/css-bundle	Patch
@remix-run/architect	Patch
@remix-run/express	Patch
@remix-run/netlify	Patch
@remix-run/testing	Patch
@remix-run/vercel	Patch
@remix-run/serve	Patch
remix	Patch
@remix-run/eslint-config	Patch

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[remix-cla-bot]

Hi @xuchaobei,

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[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳

[MichaelDeBoey]

Hi @xuchaobei!

Are you still interested in getting this one merged?

If so, please rebase onto latest dev & resolve conflicts

[brophdawg11]

Looks like async was removed in #5541 so we can close this out.