spmenu 2.1 release. This release is once again mostly a bug fix update, but
introduces some pretty cool stuff.

- Add X11 toggle, so now spmenu can run 100% on Wayland without any X libraries installed.
- Add option to override path to theme file, useful for Pywal.
- Drop official macOS support (it will most likely still work though).
- Massive documentation improvements
- Remove old preview image, add new screenshots including some animated gifs.
- Add rounded variant of the powerline
- Add support for images on Wayland too.
- Keybinds in the config file are now one liners, so the default config is a
lot more user friendly.
- Indent lines in the default config file
- Fix previously undiscovered bugs with the keybind handling
- Replace the spmenu colorscheme with a new colorscheme
- Enable rounded powerlines and indentitems by default
- Update spmenu(1) and spmenu\_run(1) to point to this repository instead.
- Fix one instance of a keybind conflict causing multiple keybinds to be activated.
- Move the rest of the headers to libs/

You can get the new release through pacman if you're using my Arch repository,
or you can simply get the source code and compile it yourself.