Log Message:
pango: update to 1.54.0.

Overview of changes in 1.54.0, 09-06-2024
=========================================
- Build fixes
- Memory leak fixes
- Drop the install-tests build option
- Add build-examples and build-tests build options
- Require meson 0.63
- Add pango_item_get_char_offset
- Update to Unicode 15.1
- Fix wrong use of GWeakRef, leading to crashes