python3Packages.crcmod: migrate to pyproject

As part of https://github.com/NixOS/nixpkgs/issues/515974

pkgs/development/python-modules/crcmod/default.nix

@@ -2,18 +2,21 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "crcmod";
   version = "1.7";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "07k0hgr42vw2j92cln3klxka81f33knd7459cn3d8aszvfh52w6w";
   };
 
+  build-system = [ setuptools ];
+
   meta = {
     description = "Python module for generating objects that compute the Cyclic Redundancy Check (CRC)";
     homepage = "https://crcmod.sourceforge.net/";