scanpypi: fix code style

Fix these warnings:
E401 multiple imports on one line

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Cc: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

utils/scanpypi

@@ -10,7 +10,9 @@ from __future__ import print_function
 from __future__ import absolute_import
 import argparse
 import json
-import six.moves.urllib.request, six.moves.urllib.error, six.moves.urllib.parse
+import six.moves.urllib.request
+import six.moves.urllib.error
+import six.moves.urllib.parse
 import sys
 import os
 import shutil