Missing possibility to parameterize antialiasing used in image compression

[thisisthekap]

Some images need specific settings when compressing (like circles which may appear pixelated).

[thisisthekap]

Antialiasing may be enabled when creating the SkiaSharp SKPaint instance:

ResizetizerNT/Resizetizer.NT/SkiaSharpTools.cs

Lines 32 to 35 in 319fc3f

	Paint = new SKPaint
	{
	ColorFilter = SKColorFilter.CreateBlendMode(color, SKBlendMode.SrcIn)
	};

Can we think of any drawbacks (expect for resize performance) when enabling antialiasing by default?

If enabling it by default is a viable option, I'd be happy to do a PR for it.