42100 Run secondary animation of previous route when using pushReplacement(… (a: animation, a: quality, cla: yes, f: routes, framework, severe: API break, waiting for tree to go green)

42703 fixes sliver list child layout offset calculation (a: quality, cla: yes, customer: crowd, f: scrolling, framework, waiting for tree to go green)

43457 Add macOS to TargetPlatform (a: desktop, cla: yes, framework, platform-mac)

43547 Add Density API to ThemeData, implement for buttons. (cla: yes, f: material design, framework, team)

43696 Avoid using FlutterError.fromParts when possible (a: tests, cla: yes, f: cupertino, f: material design, framework)