bump for release [ci skip]

Author: ctalkington

README.md

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-# zip-stream v0.3.6 [![Build Status](https://travis-ci.org/ctalkington/node-zip-stream.svg?branch=master)](https://travis-ci.org/ctalkington/node-zip-stream)
+# zip-stream v0.3.7 [![Build Status](https://travis-ci.org/ctalkington/node-zip-stream.svg?branch=master)](https://travis-ci.org/ctalkington/node-zip-stream)
 
 zip-stream is a streaming zip archive generator. It was built to be a successor to [zipstream](https://npmjs.org/package/zipstream). Dependencies are kept to a minimum through the use of many of node's built-in modules including the use of zlib module for compression.
 

package.json

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 {
   "name": "zip-stream",
-  "version": "0.3.6",
+  "version": "0.3.7",
   "description": "a streaming zip archive generator.",
   "homepage": "https://github.com/ctalkington/node-zip-stream",
   "author": {