chore(deps-dev): bump supercluster from 8.0.1 to 9.1.0

[dependabot]

Bumps supercluster from 8.0.1 to 9.1.0.

Release notes

Sourced from supercluster's releases.

v9.1.0

Adds a flat tile envelope matching geojson-vt v5's getTileRaw, and moves TypeScript declarations into the package.

API changes

• New getTileRaw(z, x, y) returns the same tiles as getTile, but with each feature's coordinates inline — {type: 4, x, y, tags} instead of {type: 1, geometry: [[x, y]], tags}. Every clustered feature is a single point, so this is geojson-vt's raw envelope narrowed to its lone-point variant, and consumers that unwrap geometry[0] immediately can skip two array allocations per feature. getTile is unchanged.
• TypeScript declarations ship with the package. Remove @types/supercluster if you have it installed.

TypeScript migration

The bundled declarations cover the same surface as @types/supercluster@7.1.3, with three differences:

• Breaking for @types users: types are named exports rather than members of a merged Supercluster namespace. Replace Supercluster.Options<P, C> with an import type {Options} from 'supercluster'. Using Supercluster<P, C> itself in type position still works. This matches how geojson-vt's declarations are shaped.
• Tile tags are typed | null | undefined. Supercluster passes each input feature's properties through verbatim, so tags is null when the input had properties: null and undefined when it omitted the member — both need a guard before use. The old declarations claimed tags was always present.
• load() accepts MultiPoint features as well as Point, matching the support added in v9.0.0.

v9.0.0

• Radically optimize memory footprint and performance — on a sample 1M points index, Supercluster now uses 94% less transient allocation, 57% lower peak heap, 65% less retained memory, and runs 23% faster. #258
• Improve internal coordinate precision by 6 bits (64 times).
• ⚠️ Breaking: hard-cap maxZoom at 30 (it wasn't practical to use it on higher zooms anyway).
• Add support for MultiPoint features. #263

Commits

• 641713a 9.1.0
• 0f1d49e upgrade dev deps
• e25a857 improve type definitions
• c56989d add getTileRaw and TS definitions
• 5071bca 9.0.0
• 27dbb50 update CI actions & Node to v24
• 8a97f6a Add support for MultiPoint features (#263)
• 8d08581 cap maxZoom at 30
• cd76543 upgrade dev deps
• 0ebc4af reuse parent zoom trees when no clusters form
• Additional commits viewable in compare view

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