New features

Lua scripting and configuration. For more information consult
SCRIPTING.md documentation file. To convert your existing Toml
configuration, use provided Python script (scripts/toml_to_lua.py).
Focus windows and columns by number.
Automatic virtual workspace creation.
Menubar customization - icons, colors and gradients.
App launcher for integration with macOS menus.
Virtual workspace first/last/east/west operations. (#341)
Preset vertical sizes for stacked windows.
Window rule copying from menubar and keyboard shortcuts. This
simplifies creation of custom window matchers.

Notable Fixes

Cmd-Tab window switching correctly exposes windows and workspaces.
Hold position for manually positioned windows.
Improved window resize detection during switching of displays with
different DPI.
Handle window focus rejection. (#340)
Correct handling of stacked windows in multiple virtual workspaces.
Revival of event tap during stalls.
Correctly raise windows when switching virtual workspaces.
Overlap detection and rate limiting for move movement trigger.
Do not draw false overlay on empty workspaces. (#153)
Handle oversize windows during display changes.
A whole bunch of performance optimizations and fixes.

Full Changelog: v0.4.4...v0.5.0