update packages to latest version

node_modules/npm/lib/ping.js

@@ -0,0 +1,20 @@
+var npm = require('./npm.js')
+
+module.exports = ping
+
+ping.usage = 'npm ping\nping registry'
+
+function ping (args, silent, cb) {
+  if (typeof cb !== 'function') {
+    cb = silent
+    silent = false
+  }
+  var registry = npm.config.get('registry')
+  if (!registry) return cb(new Error('no default registry set'))
+  var auth = npm.config.getCredentialsByURI(registry)
+
+  npm.registry.ping(registry, {auth: auth}, function (er, pong) {
+    if (!silent) console.log(JSON.stringify(pong))
+    cb(er, er ? null : pong)
+  })
+}