- Run testsuite

- Update to version 1.8.0
New:
* Pin screenshots in frameless windows that stay in foreground.
* Support for unit tests.
* Add brew cask package for ksnip.
* Allow setting image quality when saving images.
* Add support for cross-platform wayland screenshots using
xdg-desktop-portal.
* Add save and save as tab contextMenu items.
* Add open directory context menu item on capture tabs.
* Add copy path to clipboard context menu item on capture tabs.
* Add option to delete saved images.
* Add support for loading image from stdin.
* Add screenshot options as application actions to desktop file.
* Allow renaming existing images.
* Make hiding main window during screenshot optional.
* Open several files at once in tabs.
* Allow modifying selected rectangle before making screenshot.
* Option to keep main window hidden after a taking screenshot.
Changed:
* Show all Screenshot options in System Tray.
* Upload multiple stickers at once.
* Follow pattern for monochromatic systray icon.
* Pin window shows default cursor when mouse over it.
* Cancel snipping area if no selection made after 60 sec.
* Allow removing imgur account.
Fixed:
* zh_Hans translation won't load.