rmapshaper 0.4.0

New features

Added sys argument to allow the use of the system mapshaper if it’s installed (#61)

Upgraded to mapshaper v0.4.64 (#60)
sf::st_read() is now used throughout for reading from disk and from geojson strings, which allows for greater consistency and better performance.
Better handling of different column classes (#68, thanks @mdsumner)
Avoid stackoverflow caused by adding special geojson classes (#71, https://github.com/ropensci/geojsonio/issues/128)
The name of the sf column is now properly retained (#70)
Fixed issue where encoding/special characters were not preserved (#67)

Fixed a bug where converting geojson objects to sf failed with sf >= 0.5-6 (#64)

Methods for sf and sfc classes have been added (#46)
rmapshaperid column is only retained if it is the only column, otherwise it’s dropped.
ms_innerlines returns only the geometry for sf and Spatial*DataFrame classes. (#57)
ms_dissolve gains a weight argument for generating weighted centroids of dissolved points. (#39)

Added snap_interval to ms_simplify() (#43, @nikolai-b)
Bug-fix: Respect drop_null_geometries argument in ms_simplify.geo_list() (#45, @nikolai-b)
Add Kent Russell (@timelyportfolio) to authors list for his JavaScript expertise and advice
Add Matthew Bloch (@mbloch) to authors list as mapshaper copyright holder
Update mapshaper to version 0.3.41
A V8 session is now launched once per function call and destroyed when the function exits, rather than created on package load and retained for the entire session (#49)
Column classes are now restored after being sent through mapshaper functions (#46)
Fixed a bug where very small values of keep in ms_simplify() were converted to scientific notation (#48)
Added weighting argument to ms_simplify() (#27)
Added remove_slivers argument in ms_clip() and ms_erase()