Maintenance release.
- Fix a couple compiler warnings.
- Update all dependencies to latest.
- Update all supported hosts (for testing) to latest.
- Add new host test file for FLStudio + CLAP, seems OK now.
- Breaking change: since JUCE 8 is minimum Windows 10, now so is Firefly!
- Replace homebrew fft with juce version, should speed up filter graph rendering a bit.