Disable sourcemap generation to eliminate missing source file warnings

[Copilot]

Disable Sourcemap Generation ✅ COMPLETED

Changes made:

• Remove "sourceMap": true from tsconfig.json to disable sourcemap generation
• Revert package-lock.json changes (per maintainer request)
• Verify no .js.map files are generated
• Run tests to ensure functionality is intact

Summary:
This PR disables sourcemap generation to resolve Vitest warnings about missing source files. Libraries don't need sourcemaps in distribution since they're not useful for end users.

Verification:

• ✅ Build successful with no .map files generated
• ✅ All 84 tests pass (82 passed, 1 skipped, 1 todo)
• ✅ No sourcemap references in JavaScript files
• ✅ Package-lock.json reverted to original state

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Sourcemap references missing source files</issue_title>
<issue_description>When using Vitest, I get warnings like:

Sourcemap for "mypath/node_modules/.pnpm/superjson@2.2.6/node_modules/superjson/dist/index.js" points to missing source files

The published sourcemap references source files that aren't included in the package.

Suggested fix: Enable inlineSources in tsconfig.json to embed the source content directly in the .map files:

{
  "compilerOptions": {
    "sourceMap": true,
    "inlineSources": true
  }
}

This resolves the warnings without adding extra files to the package.</issue_description>

Comments on the Issue (you are @copilot in this section)

@Skn0tt Hmm, why are we emitting sourcemaps in the first place? No need for that in a library like ours. @copilot please disable sourcemaps.

• Fixes Sourcemap references missing source files #343

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[Skn0tt]

@copilot please revert the package lock changes

[Copilot]

@copilot please revert the package lock changes

Reverted in 4354735.

[Skn0tt]

@copilot please revert the package lock changes

[Skn0tt]

My review is required for merging, but it doesn't count my approval because Copilot authored on my behalf 😢

[baraknaveh]

Any task remaining before this could be merged?