geobounds 0.1.0

Breaking change

Functions for downloading data have been renamed to follow the convention object_verb() (see https://devguide.ropensci.org/pkg_building.html):

get_gb() -> gb_get().
?get_gb_adm family -> ?gb_get_adm family.
get_gb_cgaz() -> gb_get_world(). gb_get_cgaz() is also available for backwards compatibility, as an alias of gb_get_world().
get_gb_meta() -> gb_get_metadata().

Additionally, the metadata argument has been removed. Use gb_get_metadata() instead.

gb_get_adm5() added.
gb_get_max_adm_lvl() added.
All functions:
- Source files: Use of the .zip/.shp version of the dataset instead of .geojson/.gpkg. This implies that the geojsonsf dependency in Imports is removed as it is not needed any more. As a consequence cached files with previous versions of the package are not used any more.
- Improve detection for Antarctica and Kosovo.
- All functions return a MULTIPOLYGON.
- Function fails gracefully when the country file is not available (with neither errors nor warnings).
- httr2::req_retry() implemented to avoid timeout / transient errors.
gb_get*(): In all functions now the country argument recognize mixed types (e.g. gb_get(country = c("Germany", "USA")) would work).
gb_get_world() get the latest data available on the repo https://github.com/wmgeolab/geoBoundaries/tree/main/releaseData.
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