Zap 0.1.5

Self-signed, non-notarized DMG with Sparkle appcast.

macOS may show a first-launch security warning because this build is signed with Zap's own certificate rather than notarized. If that happens, open System Settings > Privacy & Security and choose Open Anyway.

What's Changed

• Add self-signed release workflow by @woosublee in #7

Full Changelog: v0.1.4...v0.1.5