python3Packages.pyfronius: add patch for python310 compat

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

···
 , aiohttp
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , pythonOlder
 , pytestCheckHook
 }:
···
     rev = "release-${version}";
     sha256 = "1xwx0c1dp2374bwigzwhvcj4577vrxyhn6i5zv73k9ydc7w1xgyz";
   };
+
+  patches = [
+    (fetchpatch {
+      # Python3.10 compatibility; https://github.com/nielstron/pyfronius/pull/7
+      url = "https://github.com/nielstron/pyfronius/commit/9deb209d4246ff575cd3c4c5373037bf11df6719.patch";
+      hash = "sha256-srXYCvp86kGYUYZIXMcu68hEbkTspD945J+hc/AhqSw=";
+    })
+  ];
 
   propagatedBuildInputs = [
     aiohttp