GlyphOrientationVertical - new enum and parser for the glyph-orientation-vertical property
GlyphOrientationVertical - new enum and parser for the glyph-orientation-vertical property

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/622>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg