Don't try to run under 3.10 (code says 3.6-3.9).

Author: schmonz

mail/feed2exec/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.14 2022/02/04 00:04:09 wiz Exp $
+# $NetBSD: Makefile,v 1.15 2022/02/05 21:29:12 schmonz Exp $
 
 DISTNAME=		feed2exec-0.18.0
 PKGNAME=		${PYPKGPREFIX}-${DISTNAME}
@@ -39,7 +39,7 @@ TEST_DEPENDS+=		${PYPKGPREFIX}-test-runner-[0-9]*:../../devel/py-test-runner
 
 USE_LANGUAGES=		# none
 
-PYTHON_VERSIONS_INCOMPATIBLE=	27
+PYTHON_VERSIONS_INCOMPATIBLE=	27 310
 
 USE_PKG_RESOURCES=	yes