[MU3] Update Bravura to 1.39

[Jojo-Schmitz]

As taken fresh from https://github.com/steinbergmedia/bravura
Follow up to #4879, which updated it to 1.32

[Jojo-Schmitz]

Most of the vtest differences are very minor and to be expected. But the one for arpeggios is not:
Before:

after:

Note the wiggly down arrow arpeggio, which is just plain wrong. From the FONTLOG.txt:
Swapped direction of wiggleArpeggiatoDownArrow (U+EAAE) and wiggleArpeggiatoDownSwash (U+EAAC), which pretty much explains this.

[Jojo-Schmitz]

Fixed it to this:

[Spire42]

It looks like the vtest is still failing because in the current output of the PR, the wiggles on the downward-pointing arpeggiatos are now left-to-right mirror images of the way they used to look.

If this new output is correct (and according to Gould's Behind Bars, it is — I just checked), then you need to update the vtest.

[Jojo-Schmitz]

The vtests are showing differences indeed, but they are pretty minor as far as I can tell and there's no need to update the vtests, not for this PR anyway.
There are larger differences for the "wiggly down arpeggios" though, due to the fact that they now wiggle differently vs. before (see the images above, very closely), as they now are basically just "wiggly up arpeggios" turned 180°, as apparently the change Daniel Spreadbury did to the font, esp. to the wiggleArpeggiatoDownArrow, doesn't work well with our implementation of symbolLine().

A general overhaul of all vtests though would be worth a separate PR, one day, maybe after 3.5 release. Many of the scores used there still stem from MuseScore 2.x, a direct comparison of the ref files with the current ones would show huge differences, this CI_test just compares between 2 subsequent commits, not against those ref files.

[anatoly-os]

I don't think the issues with the symbols are worth updating the font version. At least, not before fixing those issues.

[Jojo-Schmitz]

Fixing what issues? There is none as far as I can tell. There was one reg. arpeggio, but that's fixed now.

[Jojo-Schmitz]

oops, update to 1.37 needed meanwhile, done

[Jojo-Schmitz]

And now updated to 1.39