Pixelate filter adds bottom and right borders since v8.3.4

[Piliuta]

Problem

The Pixelate filter started adding extra borders in most cases making it look not great.
This is easy to reproduce trying to pixelate images with a lot of white area, or simply white image.

Example: https://codepen.io/piliuta/pen/NWJxxXM

Konva v8.3.3

Konva v8.3.4

I suspect this might be caused by the extra pixel added here, although not sure 8.3.3...8.3.4#diff-2b0510beac1d8e3349bfde981667cea06e65f59e40cfa7be46db06288856a5fcR2607-R2610

[lavrton]

That for the details report. Should be fixed now. I will make a release later.