math/R-cran-haven: Update to 2.4.0

math/R-cran-haven/Makefile

 PORTNAME=	haven
-DISTVERSION=	2.3.1
+DISTVERSION=	2.4.0
 CATEGORIES=	math
 DISTNAME=	${PORTNAME}_${DISTVERSION}
 

math/R-cran-haven/distinfo

-TIMESTAMP = 1591685731
-SHA256 (haven_2.3.1.tar.gz) = 6eee9f3297aab4cae2e4a4181ea65af933eacee2a2fb40af5b2ecf06f1bb9e0d
-SIZE (haven_2.3.1.tar.gz) = 277509
+TIMESTAMP = 1618539026
+SHA256 (haven_2.4.0.tar.gz) = b80bec184270dbcec85f9d84965ca6419677d5a0665229f9fd769c80ec98ce28
+SIZE (haven_2.4.0.tar.gz) = 282697