Macast v0.8.8

Built by GitHub Actions. See BUILDING.md in the repo for
instructions on how to verify and use the artefacts.

Artefacts (this release: v0.8.8):

• Macast-MacOS-arm64-v0.8.8.zip — Apple Silicon (M1+)
• Macast-Linux-x86_64-v0.8.8.tar.gz — Linux x86_64
• Macast-Linux-arm64-v0.8.8.tar.gz — Linux aarch64
• Macast-Windows-x86_64-v0.8.8.zip — Windows x86_64

Full Changelog: v0.8.7...v0.8.8