Clear the QR code matrix underneath the logo, fix #15

[kostia1st]

A few important comments as to what and why was done here:

• I noticed that the codebase in its current state is quite uneven, and to a degree does not follow its own prettier rules. So I had to apply prettier selectively where it was touching my changes. I tried to reduce unnecessary changes.
• I increased the printWidth setting for prettier to 120, as it seems like the code informally follows that rule anyway.
• before, logoWidth & logoHeight were a percentage of the entire image, which I found very inconvenient to think of, and quite unhandy in code logic. Thus I changed it so now that width and height are proportional to the actual matrix size, leaving margin out of the equasion. Which means, changing margin no longer affects logo and QR code blocks intersection logic, and logo always stays the same relative to the actual QR code.
• I did rename a few local variables here and there, since I found the previous names a bit confusing, especially the units applied to the values in question. Hope that's OK.

[kostia1st]

This one's to fix #15

[github-actions]

🎉 This issue has been resolved in version 9.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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