net/py-zeep: Update version 4.1.0=>4.2.0

- Drop support for python 3.6

Relnotes:
https://github.com/mvantellingen/python-zeep/releases/tag/4.2.0

net/py-zeep/Makefile

 PORTNAME=	zeep
-PORTVERSION=	4.1.0
+PORTVERSION=	4.2.0
 CATEGORIES=	net python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -27,7 +27,7 @@ RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}appdirs>=1.4.0:devel/py-appdirs@${PY_FLAVOR}
 		${PYTHON_PKGNAMEPREFIX}xmlsec>=0.6.1:security/py-xmlsec@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}aiohttp>=2.3.5:www/py-aiohttp@${PY_FLAVOR}
 
-USES=		python:3.6+
+USES=		python:3.7+
 USE_PYTHON=	autoplist distutils
 
 NO_ARCH=	yes

net/py-zeep/distinfo

-TIMESTAMP = 1632790284
-SHA256 (zeep-4.1.0.tar.gz) = 5867f2eadd6b028d9751f4155af590d3aaf9280e3a0ed5e15a53343921c956e5
-SIZE (zeep-4.1.0.tar.gz) = 160333
+TIMESTAMP = 1667662037
+SHA256 (zeep-4.2.0.tar.gz) = c6f3540a872239954de31e692e8343be767fb3842222f98cf31f79946b6680cf
+SIZE (zeep-4.2.0.tar.gz) = 161102