Update package.json

Update shell-quote package to avoid node security issues.

Author: Abhinay077

package.json

@@ -53,7 +53,7 @@
     "readable-stream": "^2.0.2",
     "resolve": "^1.1.4",
     "shasum": "^1.0.0",
-    "shell-quote": "^1.4.3",
+    "shell-quote": "^1.6.1",
     "stream-browserify": "^2.0.0",
     "stream-http": "^2.0.0",
     "string_decoder": "~0.10.0",