v4.0.0 — Vue 3 rewrite

Vue 2 → Vue 3, rewritten in TypeScript.

Highlights

• 🧩 Vue 3 plugin + composable — named, reactive matchMedia breakpoints; $currentViewport reactive in every component
• 🐛 Fixed the reactivity bug — components now re-render on breakpoint change; replaced deprecated MediaQueryList.addListener
• ✅ 17 tests, 100% coverage against a matchMedia mock that exercises real breakpoint switching
• 📦 0 vulnerabilities; Vite library build (ESM + CJS + UMD + types)

Breaking (v3 → v4)

• Now Vue 3 only. Migration note in the README.

npm publish of vue-viewports@4.0.0 follows shortly.