Update dependencies

[eemeli]

Should fix tests in modern environments, might break stuff in older Node.js -- this will probably require raising the minimum supported Node.js version.

• test(dom): Override global.navigator getter
• Drop intl-pluralrules as unnecessary in modern environments
• Rewrite tools as ES modules, drop esm dependency
• Update dev dependencies:
  • c8 9
  • gh-pages 6
  • prettier 3
  • sinon 17
  • jsdom 24
  • rollup 4
  • typescript 5.3
  • typedoc 0.25
  • typescript-eslint 7
• Apply updated Prettier rules
• Refresh lockfile
• Drop fluent-react/example/package-lock.json out of repo

[eemeli]

Indeed, the CI tests failed in Node.js 14. So updated the minimum tested/supported version to 18 for all packages.

[gregtatum]

Looks good to me!