ATTRIB() and SET_ATTRIB().warp is now compliant with R's C API (#39).
R >=4.0.0 is now required.
as.POSIXlt() (#36).All optional arguments must now be specified by name.
warp_change() has two new arguments, last and endpoint, for controlling
exactly what type of change points are returned.
NEWS.md file to track changes to the package.