mail/py-pyspf: Convert to USE_PYTHON=pep517

- Bump PORTREVISION for package change

mail/py-pyspf/Makefile

 PORTNAME=	pyspf
 PORTVERSION=	2.0.14
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	mail python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -11,12 +11,14 @@ WWW=		https://github.com/sdgathman/pyspf
 
 LICENSE=	PSFL
 
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}authres>=0:mail/py-authres@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}dnspython>=1.16.0,1:dns/py-dnspython@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}yaml>=0:devel/py-yaml@${PY_FLAVOR}
 
 USES=		python shebangfix
-USE_PYTHON=	autoplist concurrent distutils
+USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes