chore: release v1.9.0

[reearth-app]

Release v1.9.0

This PR was automatically created by the release workflow.

Changelog

[1.9.0] - 2026-05-28

Changes

• ci: report coverage via vitest-coverage-report-action instead of codecov
• docs: rewrite and expand README
• feat: synchronize Object.defineProperty across the boundary
• feat: add marshalByReference for opaque pass-by-reference (HostRef)
• feat: marshal BigInt values
• feat: add syncEnabled option to disable sync globally (closes fix: add option to disable sync mode #31)
• docs: document new marshalling support, AsyncArena, and using
• feat: add AsyncArena for QuickJSAsyncContext
• feat: marshal ArrayBuffer/TypedArray/Map/Set and add Arena[Symbol.dispose]
• refactor: use native VM APIs and clean up VMMap
• perf: cache compiled functions per context in call()
• fix: upgrade to quickjs-emscripten 0.32 and fix handle leaks it surfaces
• ci: auto-push version tag when a release PR is merged

Pre-merge Checklist

• Review version bump is correct
• Review changelog entries
• All tests passing
• Build successful

Post-merge Steps

After merging this PR:

1. The Tag release workflow pushes the v1.9.0 tag automatically, which triggers Publish.
2. Approve the npm-publish environment on the resulting Publish workflow run to publish to npm with provenance

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	97.37%	669 / 687
🔵	Statements	93.09%	742 / 797
🔵	Functions	95.5%	170 / 178
🔵	Branches	84.2%	469 / 557

File Coverage

No changed files found.

Generated in workflow #527 for commit bbbcccf by the Vitest Coverage Report Action