libpg_query: add squawk as reverse dependency to passthru.tests

{ lib, stdenv, fetchFromGitHub, which }:

{ lib, stdenv, fetchFromGitHub, which, squawk }:

stdenv.mkDerivation rec {

  pname = "libpg_query";

  doCheck = true;

  checkTarget = "test";

  passthru.tests = {

    inherit squawk;

  };

  meta = with lib; {

    homepage = "https://github.com/pganalyze/libpg_query";

    description = "C library for accessing the PostgreSQL parser outside of the server environment";