py-kb: Clarify with it is incompatible with 3.6 and 3.7

[Leonardo Taccari <leot%NetBSD.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Leonardo Taccari <leot%NetBSD.org@localhost>
Pushed By:	leot
Date:		Sat May 29 12:13:56 2021 +0200
Changeset:	a4b76c986524603857df3d069d1e52900c6f1ef2

Modified Files:
	py-kb/Makefile

Log Message:
py-kb: Clarify with it is incompatible with 3.6 and 3.7

Thanks to Giuseppe for explaining it!

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=a4b76c986524603857df3d069d1e52900c6f1ef2

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 py-kb/Makefile | 1 +
 1 file changed, 1 insertion(+)

diffs:
diff --git a/py-kb/Makefile b/py-kb/Makefile
index 9224ddd08f..7b39779556 100644
--- a/py-kb/Makefile
+++ b/py-kb/Makefile
@@ -17,6 +17,7 @@ DEPENDS+=	${PYPKGPREFIX}-gitpython-[0-9]*:../../devel/py-gitpython
 DEPENDS+=	${PYPKGPREFIX}-sqlite3-[0-9]*:../../databases/py-sqlite3
 DEPENDS+=	${PYPKGPREFIX}-toml-[0-9]*:../../textproc/py-toml
 
+# Not for 2.7.  3.6 and 3.7 would need py-attr that is currently not packaged
 PYTHON_VERSIONS_INCOMPATIBLE=	27 36 37
 
 USE_LANGUAGES=	# none