v0.4.0

Changelog

• 3da9d60: feat: border the active pane so keyboard focus is visible (#3) (@dchancogne)
• 11a4a5e: fix: box the help overlay and show all keybindings, not just short help (#2) (@dchancogne)

Verifying this release

See the "Verifying releases" section of README.md for the full
checksum/signature verification steps.