Add warning when bc is missing

Fix make install broken in 1.4.4

Fix bugs with missing extensions/filenames

Hotfix: 'require' typos introduced in 1.4.2

1.4.2 - minor bugfix release

Fix issue with copying image to clipboard

Active monitor screenshots, pretty URL option etc

* Active config values are now shown as part of verbose output
* File extension can now be set with `format` in config and/or at runtime
* New `pretty_urls` config option to support Nextcloud servers that require `/index.php`
* Screenshot the active display with `nextshot --monitor`, or `-m` for short
* Window selection on Sway is now via Slurp instead of a list
* Floating windows weren't able to be selected on Sway

Fix issue parsing hlColour in EU locales

Fix a typo in the usage info. Thanks @sstutz!

(Happy) New year, new logo!

* `--prune-cache` option to remove cached images older than 30 days
* New "logo" with a proper png icon for the tray menu
* Config window's button icons no longer depend on GTK icon names
* Running `make install` is now more verbose
* Pasting the share URL in Alacritty will no longer hang or error
* Quit icon in tray menu is finally a proper Quit icon again