fix: return `this` from `destroy()`

[danielroe]

For consistency with Node readable stream implementation, destroy() should likely return this - see https://nodejs.org/api/stream.html#readabledestroyerror and https://nodejs.org/api/stream.html#writabledestroyerror

Context: https://github.com/DefinitelyTyped/DefinitelyTyped/pull/57473