add player to any callbacks when using mithril scythe

hoes.lua

@@ -433,7 +433,7 @@ minetest.register_tool("farming:scythe_mithril", {
 
 		-- Run script hook
 		for _, callback in pairs(core.registered_on_dignodes) do
-			callback(pos, node)
+			callback(pos, node, placer)
 		end
 
 		-- play sound