python3Packages.jsonpath-ng: temporary use setuptools format

Too many rebuilds to merge this to master otherwise, but should be
updated to use the PEP517 build system.

Changed files
+2
pkgs
development
python-modules
jsonpath-ng
+2
pkgs/development/python-modules/jsonpath-ng/default.nix
···
buildPythonPackage rec {
pname = "jsonpath-ng";
version = "1.7.0";
+
format = "setuptools";
+
# TODO: typo; change to pyproject = true;
pypropject = true;
disabled = pythonOlder "3.8";