update packages to latest version

node_modules/npm/lib/config/clear-credentials-by-uri.js

@@ -0,0 +1,16 @@
+var assert = require("assert")
+
+var toNerfDart = require("./nerf-dart.js")
+
+module.exports = clearCredentialsByURI
+
+function clearCredentialsByURI (uri) {
+  assert(uri && typeof uri === "string", "registry URL is required")
+
+  var nerfed = toNerfDart(uri)
+
+  this.del(nerfed + ":_authToken", "user")
+  this.del(nerfed + ":_password",  "user")
+  this.del(nerfed + ":username",   "user")
+  this.del(nerfed + ":email",      "user")
+}