Remove occurrences of the struct update syntax deprecated in Elixir 1.19 (#216)

Author: alco

lib/stream_data.ex

@@ -693,7 +693,7 @@ defmodule StreamData do
   @spec unshrinkable(t(a)) :: t(a) when a: term()
   def unshrinkable(data) do
     new(fn seed, size ->
-      %LazyTree{call(data, seed, size) | children: []}
+      %{call(data, seed, size) | children: []}
     end)
   end
 

lib/stream_data/lazy_tree.ex

@@ -140,7 +140,7 @@ defmodule StreamData.LazyTree do
         end
       end)
 
-    %__MODULE__{tree | children: children}
+    %{tree | children: children}
   end
 
   @doc """