Switch dependency to probe-image-size

[asamuzaK]

Fixes #1668, #1669

'sharp' requires Python executable when installing, but Python is not installed by default on Windows, so we should replace 'sharp' to something else.

Fixed SVG icon size mismatch warning too.

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[EnTeQuAk]

Looks good to me, thanks a lot for the change!

cc @rpl and @kumar303

I'll release this asap

[kumar303]

Thanks @asamuzaK !

[rpl]

@asamuzaK thank you so much!