v3.0-beta1-3

Optimize for Flathub!

v3.0-beta1-2

Changed app-id to io.github.jeffshee.Hidamari as suggested in Flathub App Requirements.
Otherwise it's identical to previous release (v3.0-beta1).

v3.0-beta1

Hi! Hidamari v3

• First Flatpak build 📦
• Bug fixes and performance improvements 😎