Changelog:
- Added: App style: dark
- Fixed: Images are not displayed in some feeds
- Fixed: Sometimes news filter did not work when updating feeds
- Fixed: Parsing of some feeds
- Main: Switch to Qt 5.13
- Main: Embedded browser - WebKit 602.1
- Added: Calendar to avoid downloading old new
- Changed: SQLite 3.30.1
- Removed: Share. Google+
- Fixed: Description of some feeds
- Fixed: Parsing of some feeds
Signed-off-by: Algent Albrahimi <algent@protonmail.com>