Merge pull request #1246 from mozilla/greenkeeper/yauzl-2.8.0

Update yauzl to the latest version 🚀

package.json

@@ -90,6 +90,6 @@
     "url-parse": "1.1.8",
     "xmldom": "0.1.22",
     "yargs": "7.1.0",
-    "yauzl": "2.7.0"
+    "yauzl": "2.8.0"
   }
 }