Update rfd to use pyproject format

overlays/rfd/default.nix

@@ -1,27 +1,25 @@
-{ lib, fetchFromGitHub, python3, }:
+{ lib, fetchFromGitHub, python3 }:
 
 let py = python3.override { };
 
 in with py.pkgs;
 buildPythonApplication rec {
   pname = "rfd";
-  version = "v0.6.0";
+  version = "v0.7.1";
+  format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "davegallant";
     repo = "rfd";
     rev = version;
-    hash = "sha256:0cllhbca4dykl6j8snmml4kk6kzamlzhcrdf49f5v0zk7zljgkl1";
+    hash = "sha256-imFSkCFeSMLW7QYYF3cXp7tKEruLt8a6W3JDPblKHHU=";
   };
 
-  postPatch = ''
-    substituteInPlace requirements.txt --replace "soupsieve<=2.0" "soupsieve"
-    substituteInPlace requirements.txt --replace "beautifulsoup4<=4.8.2" "beautifulsoup4"
-  '';
-
   # No tests included
   doCheck = false;
 
+  nativeBuildInputs = [ poetry ];
+
   propagatedBuildInputs = with py.pkgs; [
     beautifulsoup4
     click
@@ -35,7 +33,7 @@ buildPythonApplication rec {
   meta = with lib; {
     homepage = "https://www.redflagdeals.com/";
     description = "View RedFlagDeals from the command line";
-    license = licenses.asl20;
-    maintainers = [ ];
+    license = licenses.gpl3;
+    maintainers = [ davegallant ];
   };
 }