Features

• status handlers in HMR api can now return Promises to delay the HMR process
• reasons in stats can now be grouped and collapsed
  • add stats.reasonsSpace and stats.groupReasonsByOrigin

Bugfixes

• fix a crash in asset modules when updating persistent cached modules from unsafe cached modules

Performance

• detailed preset limits all spaces to 1000 by default
• upgrade webpack-sources for a performance bugfix