devel/libregf: update to alpha-20210615

devel/libregf/Makefile

 # Created by: Antoine Brodin <antoine@FreeBSD.org>
 
 PORTNAME=	libregf
-DISTVERSION=	alpha-20201007
+DISTVERSION=	alpha-20210615
 CATEGORIES=	devel
 MASTER_SITES=	https://github.com/libyal/libregf/releases/download/${PORTVERSION:E}/ \
 		LOCAL/antoine

devel/libregf/distinfo

-TIMESTAMP = 1602138320
-SHA256 (libregf-alpha-20201007.tar.gz) = 3460f877d980e9de3dff45e72feda1819730e0b8189d94836676dd8327715e0b
-SIZE (libregf-alpha-20201007.tar.gz) = 1678494
+TIMESTAMP = 1623792626
+SHA256 (libregf-alpha-20210615.tar.gz) = 6815acf84a2cc091492bc7b536747ddf88d061ab8583ace4635a3d6608e1b3be
+SIZE (libregf-alpha-20210615.tar.gz) = 1690024