Update zip.js

lib/plugins/zip.js

@@ -14,6 +14,7 @@ var util = require('archiver-utils');
  * @param {String} [options.comment] Sets the zip archive comment.
  * @param {Boolean} [options.forceLocalTime=false] Forces the archive to contain local file times instead of UTC.
  * @param {Boolean} [options.forceZip64=false] Forces the archive to contain ZIP64 headers.
+ * @param {Boolean} [options.namePrependSlash=false] Prepends a forward slash to archive file paths.
  * @param {Boolean} [options.store=false] Sets the compression method to STORE.
  * @param {Object} [options.zlib] Passed to [zlib]{@link https://nodejs.org/api/zlib.html#zlib_class_options}
  */
@@ -25,6 +26,7 @@ var Zip = function(options) {
   options = this.options = util.defaults(options, {
     comment: '',
     forceUTC: false,
+    namePrependSlash: false,
     store: false
   });
 
@@ -90,6 +92,7 @@ module.exports = Zip;
  * @property {String} [comment] Sets the zip archive comment.
  * @property {Boolean} [forceLocalTime=false] Forces the archive to contain local file times instead of UTC.
  * @property {Boolean} [forceZip64=false] Forces the archive to contain ZIP64 headers.
+ * @prpperty {Boolean} [namePrependSlash=false] Prepends a forward slash to archive file paths.
  * @property {Boolean} [store=false] Sets the compression method to STORE.
  * @property {Object} [zlib] Passed to [zlib]{@link https://nodejs.org/api/zlib.html#zlib_class_options}
  * to control compression.
@@ -102,6 +105,7 @@ module.exports = Zip;
  * @property {String} name Sets the entry name including internal path.
  * @property {(String|Date)} [date=NOW()] Sets the entry date.
  * @property {Number} [mode=D:0755/F:0644] Sets the entry permissions.
+ * @property {Boolean} [namePrependSlash=ZipOptions.namePrependSlash] Prepends a forward slash to archive file paths.
  * @property {String} [prefix] Sets a path prefix for the entry name. Useful
  * when working with methods like `directory` or `glob`.
  * @property {fs.Stats} [stats] Sets the fs stat data for this entry allowing