Dash-leaflet

Added

- Add support for `flatgeobuf` file format, including bounding box filtering
- Add extra optional options (`svg`, `geobuf`, `all`)

Changed

- Restored support for `geobuf` file format

Changed

- When clustering is enabled, the `GeoJSON` component now performs _delta_ updates, i.e. features that remain within the viewport are no longer redraw on pan/zoom. Fixes [180](https://github.com/thedirtyfew/dash-leaflet/issues/180)
- The map viewport is now tracked (through the `zoom`, `center`, and `bounds` properties) unless `trackViewport` it set to `False`. Fixes [194](https://github.com/thedirtyfew/dash-leaflet/issues/194)

Added

- Add option to specify custom units in the `MeasureControl`. Fixes [130](https://github.com/thedirtyfew/dash-leaflet/issues/130)
- Add `invalidateSize` option to the map component. Fixes [73](https://github.com/thedirtyfew/dash-leaflet/issues/73)

Changed

- The `GeoJSON` component now supports single features (in addition to feature collections). Fixes [160](https://github.com/thedirtyfew/dash-leaflet/issues/160)

Added

- New event handling system, allowing much greater flexibility
- Basic unit tests for all components (rendering or better)
- Added (separate) `Attribution` component

Changed

- Library completely rewritten in TypeScript based on React Leaflet v4
- Dependencies updated (incl. React version bump), npm now reports *0 vulnerabilities*
- Various fixes, incl. but not limited to [193](https://github.com/thedirtyfew/dash-leaflet/issues/193), [#192](https://github.com/thedirtyfew/dash-leaflet/issues/192), [#189](https://github.com/thedirtyfew/dash-leaflet/issues/189), [#184](https://github.com/thedirtyfew/dash-leaflet/issues/184), [#178](https://github.com/thedirtyfew/dash-leaflet/issues/178)
- The `GeoJSON` component is now loaded async, bringing the main asset < 300 kB

Removed

- Dropped `Minichart` component. The underlying library is not maintained, and the current version in incompatible with newer versions of Leaflet
- Dropped `MarkerClusterGroup` component due to performance issues. Please use the `GeoJSON` instead
- Dropped `GeoTIFFOverlay` component. This (highly custom) component has long been deprecated, and I decided now was the time to drop it completely

Added

- Added leaflet source maps

Changed

- Modified ImageOverlay `loaded` property to include more information

Changed

- Added ImageOverlay `loaded` property, which is set to `true` when the image has finished loading