v0.6.0

Added

• [breaking] upgrade Bevy 0.15 -> 0.18 (#92)

Other

• (deps) migrate ycbust 0.4.1 -> 0.5.1 (async-only + opt-in blocking) (#94)
• (deps) semver-compatible lockfile refresh after v0.5.6 (#90)
• (deps) remove unused direct reqwest dependency (#91)