appstream-glib: update to 0.8.0.

Version 0.8.0
~~~~~~~~~~~~~
Released: 2022-07-15

New Features:
- Add validation for duplicate license xml elements (Otto Urpelainen)
- Add vcs-browser and contribute URL type (JakobDev)
- Port from libsoup to libcurl (Richard Hughes)
- Support em/code tags (Philip Müller)
- Use GProxyResolver to auto-detect the correct proxy (Richard Hughes)

Bugfixes:
- Align the OARS/CSM mappings (Philip Withnall)
- Also unwrap description in metainfo files (Fabian Vogt)
- Check --version-script linker option before using (Biswapriyo Nath)
- Consider the AppStream version as a string (Corentin Noël)
- Do not show a critical warning on <suggests><id/></suggests> (Richard Hughes)
- Fix extracting relative symlinks and file paths in icon tarball (Fabian Vogt, Philip Withnall)
- Fix Markdown underlining in appdata-to-news (Philip Withnall)
- Fix validation of translated captions when LANG is not C (Richard Hughes)
- Make directories as 0755 && umask (Pavel Raiskup)
- Parse custom and launchables from DEP-11 (Sebastian Krzyszkowiak)
- Sync the ITS file with appstream (Piotr Drąg)
- Update current version in AsStore (Corentin Noël)
- Update to SPDX 3.16 (Nick Richards)

(wiz)