textproc/py-cmarkgfm: Update to 0.5.3

Changes:	https://github.com/theacodes/cmarkgfm/releases

textproc/py-cmarkgfm/Makefile

 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 
 PORTNAME=	cmarkgfm
-PORTVERSION=	0.5.2
+PORTVERSION=	0.5.3
 CATEGORIES=	textproc python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

textproc/py-cmarkgfm/distinfo

-TIMESTAMP = 1609598915
-SHA256 (cmarkgfm-0.5.2.tar.gz) = e7d65b90645faa55c28886d01f658235af08b4c4edbf9d959518a17007dd20b4
-SIZE (cmarkgfm-0.5.2.tar.gz) = 134711
+TIMESTAMP = 1618320268
+SHA256 (cmarkgfm-0.5.3.tar.gz) = b6a549aba327abd986d6748cf21c8637d741c76850e7fefbdef8d28bfe138e32
+SIZE (cmarkgfm-0.5.3.tar.gz) = 134806