13764.md

Support TypeScript 4.9 (#13764, #13783, #13872 by @sosukesuzuki)

Support TypeScript 4.9 features!

satisfies operator

const palette = {
  red: [255, 0, 0],
  green: "#00ff00",
  blue: [0, 0, 255]
} satisfies Record<Colors, string | RGB>;