chore(typings): define Messenger['on'] and Messenger['once']

[waitingsong]

Checklist

• npm test passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

Description of change

[BaffinLee]

Why not

import { EventEmitter } from 'events'

// ...

export interface Messenger extends EventEmitter {

  // ...

}

It seems better.

[codecov]

Codecov Report

Merging #2763 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2763   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files          29       29           
  Lines         829      829           
=======================================
  Hits          826      826           
  Misses          3        3

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[waitingsong]

thanks @BaffinLee

[waitingsong]

ci 怎么老是挂

[popomore]

需要 rebase 下

[waitingsong]

rebased