fix: update setTimeout return type in socket.ts

[vpontis]

When we install Viem we get a Typescript issue because Timer is not defined in some environments. Instead, we can look at the return type for setTimeout so that this works well across Node and web environments.

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PR-Codex overview

This PR focuses on updating the type of the keepAliveTimer variable in the src/utils/rpc/socket.ts file to improve type safety and clarity.

Detailed summary

• Updated the type of keepAliveTimer from Timer | undefined to ReturnType<typeof setInterval> | undefined.
• Added a note in the .changeset/small-pianos-agree.md file indicating the patch for viem and the update to the internal keepAliveTimer type.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 2888cd0

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

This PR includes changesets to release 1 package

Name	Type
viem	Patch

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[vercel]

@vpontis is attempting to deploy a commit to the Wevm Team on Vercel.

A member of the Team first needs to authorize it.

[vpontis]

This project is a bit confused between pnpm and bun. Timer is a bun-only type and in the screenshot below you can see the project says "pnpm" but links to "bun"...

[jxom]

That contributing guide should be pnpm. Open to another PR to fix it!

[vpontis]

Thank you for merging this in so quickly. Could you publish a version with this fix in?