Support File.stream!/3 in multiple Elixir versions

For UploadFile, this adds backwards compatible support for streaming
file contents to NervesHub via the `File.stream!/3` function which
reordered arguments in Elixir >- 1.16

lib/nerves_hub_link/upload_file.ex

@@ -39,7 +39,7 @@ defmodule NervesHubLink.UploadFile do
 
     :ok = Socket.start_uploading(state.socket_pid, filename)
 
-    File.stream!(state.file_path, 1024)
+    file_stream!(state)
     |> Stream.with_index()
     |> Stream.each(fn {chunk, index} ->
       :ok = Socket.upload_data(state.socket_pid, filename, index, chunk)
@@ -50,4 +50,10 @@ defmodule NervesHubLink.UploadFile do
 
     {:noreply, state}
   end
+
+  if Version.match?(System.version(), ">= 1.16.0") do
+    def file_stream!(state), do: File.stream!(state.file_path, 1024, [])
+  else
+    def file_stream!(state), do: File.stream!(state.file_path, [], 1024)
+  end
 end