Make sure our dimensions are in actual µm.
Note that this will mess with any cached JSON files since they are now on a
different scale.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
gresources and svgwrite don't (yet?) take a Path though, so we have to use
os.fspath() to convert those.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>