scriv: fix tests by patching fixture

scriv build was broken due to the test fixture adding a deprecated
argument to Click CliRunner. This broke tests and the whole package
build.

The issue was already resolved upstream, but not yet incorporated into a
release. Patching for now.

pkgs/by-name/sc/scriv/package.nix

@@ -6,6 +6,7 @@
   git,
   scriv,
   testers,
+  fetchpatch,
 }:
 
 python3.pkgs.buildPythonApplication rec {
@@ -18,6 +19,14 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-fBqL5jUdA2kuXnV4Te6g2PEbLJD5G+GLD7OjdVVbUl4=";
   };
 
+  patches = [
+    # fix tests by removing deprecated Click parameter from fixture
+    (fetchpatch {
+      url = "https://github.com/nedbat/scriv/commit/04ac45da9e1adb24a95ad9643099fe537b3790fd.diff";
+      hash = "sha256-Gle3zWC/WypGHsKmVlqedRAZVWsBjGpzMq3uKuG9+SY=";
+    })
+  ];
+
   build-system = with python3.pkgs; [ setuptools ];
 
   dependencies =