pango: upgrade 1.56.3 -> 1.56.4

pango: upgrade 1.56.3 -> 1.56.4

Changelog:
===========
- fontconfig: Improve the add_font_file implementation
- fontconfig: Combine font features and style variants
- fontconfig: Make sure font faces stay alive
- win32: Drop some caching
- win32: Make sure font faces stay alive
- win32: Modernize and simplify the code
- win32: Stop synthesizing fonts
- win32: Implement list models
- coretext: Support synthetic small caps
- layout: Avoid assertions in line breaking
- build: Require GLib 2.82

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>