v2.4.0

Fixes

• Restore Font Awesome icons without a CDN. Since 2.3.0, admonitions (NOTE, TIP, WARNING, CAUTION, IMPORTANT) showed an empty box, and icon:name[] macros, such as the check marks in the products comparison tables, rendered as nothing. Font Awesome 5 Free is now bundled and served from /_/font/, and admonition icons are inline SVGs. By @arska in #171

Tests

• Add Playwright smoke tests for the preview: icon macros, admonition icons, self-hosted fonts, a third-party request allowlist, and error-free index and 404 pages. They run in CI. By @arska in #172

Build and tooling

• Migrate to ESLint 10 flat config with neostandard, replacing gulp-eslint and prettier-eslint. Convert package-lock.json to lockfile v3 and bump gulp-stylelint to 13. By @arska in #173

Dependencies

• Update dependency gulp to v5 by @renovate[bot] in #169
• Update dependency fs-extra to v11 by @renovate[bot] in #160

Full Changelog: v2.3.3...v2.4.0