Log Message:
Update to 1.4.2

Upstream changes:
Changes in version 1.4-1 (2020-xx-yy)

    warn on NULL projargs in CRS(); https://github.com/edzer/sp/pull/74

Changes in version 1.4-0 (2020-02-21)

    prepare for new (>= 1.5.1) rgdal, which creates and listens to a \ 
comments() field of a CRS object carrying a WKT representation of a CRS rather \ 
than the proj4string; @rsb, https://github.com/edzer/sp/pull/67 and \ 
https://github.com/edzer/sp/pull/69 ; for more info see e.g. \ 
https://github.com/edzer/sp/issues/68 and \ 
https://github.com/r-spatial/discuss/issues/28

Changes in version 1.3-2 (2019-11-07)

    fix length > 1 in coercion to logical error; #54, #60

    add is.na method for CRS objects