CRAN version

This release is a refactoring of the package, functions has been exploded to be
better tested and inspected.

fix

• update tests with valid provider
• remove (not functioning) Esri Delorme provider
• better management of cache, tiles and composed raster are cached
  (huge speed gain)
• remove the gdal-based merging mechanism, not efficient anymore.

feat

• improve doc in create_provider() for wms inspection (#22 @paul-carteron)
• add *.webp tile extension support (#28 @tadhg-moore)
• change the output of verbose
• cache composed raster for future use
• API keys management for Stadia and Thunderforest with env variable

CRAN version

fix

• deactivate get_tiles() example due to unpredictable download time leading to CRAN note/rejection..

CRAN version

fix

• remove various unreliable provider (OpenStreetMap.MapnikBW, HikeBike,
  Wikimedia, OpenStreetMap.NoLabels...)
• update openstreetmap provider url (#23)
• update stamen provider to stadia (#24)
• fix forceDownload mechanism (force replace *.tif files)

feat

• new function create_provider() to create provider
• use a better mechanism for apikey

maptiles_0.3.0

Minor changes

• Change projection management, faster with 3857 now
• Add adjust argument to plot_tiles() to plot the raster without zoom-in or zoom-out in the graphic device
• Modify attribution of Stamen maps