Log Message:
pango: update to 1.56.0.

Overview of changes in 1.56.0, 09-01-2025
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- Support setting font features in font descriptions
- serialization: Document the tab array format
- serialization: Accept attributes without range
- win32: Improve the pango_font_map_reload_implementation
- win32: Take variations into account for caching
- layout: Fix measuring ellipsis runs with shapes
- build: Require C11
- build: Require GLib 2.80
- build: Require cairo 1.18