devel/py-apispec: py-prance is required as a runtime dependency

When running apispec, the following message has been displayed:

ModuleNotFoundError: validate_spec requires prance to be installed.

Installing devel/py-prance fixed the problem.

PR:		262344
Approved by:	Goran Mekić (maintainer)

devel/py-apispec/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	apispec
 DISTVERSION=	5.1.1
+PORTREVISION=	1
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -10,6 +11,7 @@ COMMENT=	Pluggable API specification generator
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}prance>0:devel/py-prance@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}marshmallow>0:devel/py-marshmallow@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}mock>0:devel/py-mock@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR} \