Merge remote-tracking branch 'origin/master'

doum

昨天 2f3221b7c90d5663fdb312653a2d188bc4628370

1
2
3
4
5
6
'use strict';
var defineWellKnownSymbol = require('../internals/well-known-symbol-define');
 
// `Symbol.observable` well-known symbol
// https://github.com/tc39/proposal-observable
defineWellKnownSymbol('observable');