 Fixed errors that resulted from compilation on clang 12.2 (#88, #89).
 Fixed CRAN check errors (#80).
 Added layer creation options to
s2_options()
, which now uses strings rather than numeric codes to specify boolean operation options, geography construction options, and builder options (#70).
 Added
s2_rebuild()
and s2_simplify()
, which wrap the S2 C++ S2Builder
class to provide simplification and fixing of invalid geographies (#70).
 The s2 package now builds and passes the CMD check on Solaris (#66, #67).
 Renamed
s2_latlng()
to s2_lnglat()
to keep axis order consistent throughout the package (#69).
 Added
s2_bounds_cap()
and s2_bounds_rect()
to compute bounding areas using geographic coordinates (@edzer, #63).

s2_*_matrix()
predicates now efficiently use indexing to compute the results of many predicate comparisons (#61).
This version is a complete rewrite of the former s2 CRAN package, entirely backwards incompatible with previous versions.