export * from stream when process.env.READABLE_STREAM === 'disable' (#399)

Author: trxcllnt

readable.js

@@ -1,13 +1,8 @@
 var Stream = require('stream');
 if (process.env.READABLE_STREAM === 'disable' && Stream) {
-  module.exports = Stream;
-  exports = module.exports = Stream.Readable;
-  exports.Readable = Stream.Readable;
-  exports.Writable = Stream.Writable;
-  exports.Duplex = Stream.Duplex;
-  exports.Transform = Stream.Transform;
-  exports.PassThrough = Stream.PassThrough;
-  exports.Stream = Stream;
+  module.exports = Stream.Readable;
+  Object.assign(module.exports, Stream);
+  module.exports.Stream = Stream;
 } else {
   exports = module.exports = require('./lib/_stream_readable.js');
   exports.Stream = Stream || exports;