Fix replies only getting routed to main frame.

[JoeHartzell]

Fixes #145.

Overview

Replaces the event.sender.send with event.reply in handleIPCMessage. This will add support for replying to multiple frames.

Changes

• Updated handleIPCMessage
• Update the tests to use event.reply

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[jsonnull]

Hey @JoeHartzell, thanks again for creating this PR.

Can you make a couple quick fixes for me? I figure it'll be easier to ask you to do than for myself to push a new branch here with my fixes.

First, can you commit the original pnpm-lock.yaml? I'll update the deps in a minute any way, and add something in the repo to help everybody get on the same pnpm version. You should be able to do git checkout origin/main -- pnpm-lock.yaml and commit it.

Second, can you add the file .changeset/issue-145.md with this content:

---
'electron-trpc': patch
---

Fix `handleIPCMessage` only sending replies to Electron's main frame.

pr: 146

[JoeHartzell]

Yea. I can make those changes no problem!