Duplicate Identifier between node.d.ts and lib.d.ts

[yuit]

TypeScript Version:

nightly with "node.d.ts" from typings

We recently add thisin to es5.d.ts
Expected behavior:
No error
Actual behavior:
Duplicate Identifier with the same property defined in "node.d.ts"

[mhegazy]

//CC @RyanCavanaugh who was mentioning this earlier this week.

[mhegazy]

The proposed fix is to relax the duplicate definition error for interface members if they have the same type.

[kitsonk]

👍 that will make lots of things easier!