Fix Elixir 1.19 and OTP 28 compatibility

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: khamilowicz

.gitignore

@@ -177,3 +177,6 @@ $RECYCLE.BIN/
 *.lnk
 
 # End of https://www.gitignore.io/api/c,vim,linux,macos,elixir,windows,visualstudiocode
+
+# Dialyzer PLT cache
+/priv/plts/

mix.exs

@@ -46,9 +46,9 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
       {:membrane_common_c, "~> 0.16.0"},
       {:membrane_h264_format, "~> 0.6.1"},
       {:membrane_raw_video_format, "~> 0.4.1"},
-      {:ex_doc, "~> 0.29", only: :dev, runtime: false},
-      {:credo, "~> 1.6", only: :dev, runtime: false},
-      {:dialyxir, "~> 1.1", only: :dev, runtime: false},
+      {:ex_doc, "~> 0.34", only: :dev, runtime: false},
+      {:credo, "~> 1.7", only: :dev, runtime: false},
+      {:dialyxir, "~> 1.4", only: :dev, runtime: false},
       {:membrane_raw_video_parser_plugin, "~> 0.12.2", only: :test},
       {:membrane_file_plugin, "~> 0.17.0", only: :test},
       {:membrane_h264_plugin, "~> 0.9.0", only: :test}
@@ -57,7 +57,8 @@ defmodule Membrane.H264.FFmpeg.Plugin.MixProject do
 
   defp dialyzer() do
     opts = [
-      flags: [:error_handling]
+      flags: [:error_handling],
+      plt_add_apps: [:mix, :syntax_tools]
     ]
 
     if System.get_env("CI") == "true" do