Node v15.4.0 发布

• child_processes:
  • add AbortSignal support (Benjamin Gruenbaum) #36308
• deps:
  • update ICU to 68.1 (Michaël Zasso) #36187
• events:
  • support signal in EventTarget (Benjamin Gruenbaum) #36258
  • graduate Event, EventTarget, AbortController (James M Snell) #35949
• http:
  • enable call chaining with setHeader() (pooja d.p) #35924
• module:
  • add isPreloading indicator (James M Snell) #36263
• stream:
  • support abort signal (Benjamin Gruenbaum) #36061
  • add FileHandle support to Read/WriteStream (Momtchil Momtchev) #35922
• worker:
  • add experimental BroadcastChannel (James M Snell) #36271

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转自 https://nodejs.org/en/blog/