Mapchete

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* core

* avoid `Future.result()` calls when using dask

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* core

* `commands.cp`: fix `overwrite` mode on local filesystems
* cache input vector file bounding box to improve performance on large GeoJSON files
* add preliminary RPC referenced raster data support (also requires rasterio fix: https://github.com/rasterio/rasterio/pull/2419)
* add `dask_propagate_results` flag to `compute()` to activate/deactivate task result propagation on dask clusters

* packaging/CI

* avoid using GEOS 3.10 which causes shapely bugs


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* core

* fix zoom levels getting processed in the wrong order
* fix process tiles generation which yielded a different number than estimated from `tiles_count()`
* add fallback if `rasterio.crs.CRS` cannot convert CRS to SRS authority (issue in newer PROJ versions)

* packaging/CI

* add Python 3.9 to test matrix


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* core

* automatically write/update STAC JSON file for TileDirectory output


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* core

* use batches when yielding completed futures from dask
* fix ``KeyError`` when removing futures from threads executor


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* core

* avoid infinite recursion when retrying reprojection with clipped geometry
* attach missing dask client loop to `distributed.as_completed` call
* fixed infinite future yield when using `DaskExecutor.as_completed()`
* expose `--dask-no-task-graph` flag to `execute` and `convert` commands

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