Update vinyl-fs

Causes some warnings, but tests pass.

Author: Rob Wierzbowski

package.json

@@ -49,7 +49,7 @@
     "object-assign": "^2.0.0",
     "rimraf": "^2.2.8",
     "slash": "^1.0.0",
-    "vinyl-fs": "^0.3.7",
+    "vinyl-fs": "^1.0.0",
     "win-spawn": "^2.0.0",
     "vinyl": "^0.4.3"
   },