39932 update packages –force upgrade (cla: yes, team)

39934 remove dart dir chrome profile (cla: yes, tool)

39945 added new lifecycle state (a: existing-apps, cla: yes, framework, severe: API break)

39950 Register reload sources call and make ‘r’ restart for web (cla: yes, tool)

39951 Add “web” server device to allow running flutter for web on arbitrary browsers (cla: yes, tool, ☸ platform-web)

39983 Update the supported library set for Flutter for web (cla: yes, tool)

39985 Revert “Correct libraries path and remove dart:io and dart:isolate for dart platform” (cla: yes, tool)

39986 Enable Proguard by default on release mode (cla: yes, tool)