v4.0.0

⚠️ Breaking

• Now an ES module — use import * as mvtf from '@mapbox/mvt-fixtures' instead of require().
• Source fixtures in src/ are now JSON files instead of JS modules. If you import them directly, update paths and use JSON imports.
• Dropped the legacy scripts/dump protoc helper. Use vtvalidate or any standard protoc install for tile decoding instead.

Changes

• Regenerated .mvt fixtures are 2 bytes smaller per feature. The previous pbf version emitted an empty packed tags field for features without tags; the new version correctly omits it. Decoded tile content is unchanged.
• Dependencies upgraded; requires Node.js 22+.