fix for lime 8.1.0 (#212)

source/lime/_internal/backend/native/NativeWindow.hx

@@ -453,6 +453,28 @@ class NativeWindow
 		}
 	}
 
+	#if (lime >= "8.1.0")
+	public function setMinSize(width:Int, height:Int):Void
+	{
+		if (handle != null)
+		{
+			#if (!macro && lime_cffi)
+			NativeCFFI.lime_window_set_minimum_size(handle, width, height);
+			#end
+		}
+	}
+
+	public function setMaxSize(width:Int, height:Int):Void
+	{
+		if (handle != null)
+		{
+			#if (!macro && lime_cffi)
+			NativeCFFI.lime_window_set_maximum_size(handle, width, height);
+			#end
+		}
+	}
+	#end
+
 	public function setBorderless(value:Bool):Bool
 	{
 		if (handle != null)
@@ -661,6 +683,42 @@ class NativeWindow
 		return value;
 	}
 
+	#if (lime >= "8.1.0")
+	public function setVisible(value:Bool):Bool
+	{
+		if (handle != null)
+		{
+			#if (!macro && lime_cffi)
+			NativeCFFI.lime_window_set_visible(handle, value);
+			#end
+		}
+
+		return value;
+	}
+
+	public function getOpacity():Float
+	{
+		if (handle != null)
+		{
+			#if (!macro && lime_cffi)
+			return NativeCFFI.lime_window_get_opacity(handle);
+			#end
+		}
+
+		return 1.0;
+	}
+
+	public function setOpacity(value:Float):Void
+	{
+		if (handle != null)
+		{
+			#if (!macro && lime_cffi)
+			NativeCFFI.lime_window_set_opacity(handle, value);
+			#end
+		}
+	}
+	#end
+
 	public function warpMouse(x:Int, y:Int):Void
 	{
 		#if (!macro && lime_cffi)