v0.4.2

What's Changed

• Add tutorial of BottomBarVisibility widgets by @fujidaiti in #70
• Refactor scrollable module to prepare for upcoming features by @fujidaiti in #86
• Add new SheetNotifications for drag events by @fujidaiti in #92
• Add SheetTheme by @fujidaiti in #93
• Refactor by @fujidaiti in #95
• Add a way to specify default physics and default ancestor physics by @fujidaiti in #96
• Refactor physics module by @fujidaiti in #97
• Bump to 0.4.2 by @fujidaiti in #99

Full Changelog: v0.4.1...v0.4.2