Add "future" mingw compat header file

Signed-off-by: falkTX <falktx@falktx.com>

include/mingw-compat/future

@@ -0,0 +1,25 @@
+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#pragma once
+#include_next <future>
+#include "mingw.future.h"
+
+#undef IN
+#undef OUT
+#undef far
+#undef near