leaflet 2.2.3

• {leaflet} is now licensed under the MIT license (was GPL-2) (#958).

• {leaflet} no longer install {sp} by default and attempts to convert object to sf internally before creating a map and warns when it fails conversion (@olivroy, #942).

• The breweries91, atlStorms2005, and gadmCHE datasets are now {sf} objects (@olivroy, #944).

• {leaflet} now requires R 3.5 and above (@olivroy, #944).

• Color palette improvements. All color palette functions now support all {viridisLite} palettes ("magma", "inferno", "plasma", "viridis", "cividis", "rocket", "mako", and "turbo") (@jack-davison, #924).

• Updated vignettes to replace {sp}/{raster} usage with {sf}/{terra} and their corresponding examples. (@jack-davison, #928)

• Updated vignettes to replace {sp}/{raster} usage with {sf}/{terra} and their corresponding examples. (@jack-davison, #928)

• addProviderTiles() will now error if the chosen provider does not match any currently loaded provider (by default, those in providers). This behaviour can be toggled off by setting the new check argument to FALSE (@jack-davison, #929)