deps: upgrade npm to 3.8.9

Contains the following three npm releases:
https://github.com/npm/npm/releases/tag/v3.8.7
https://github.com/npm/npm/releases/tag/v3.8.8
https://github.com/npm/npm/releases/tag/v3.8.9

PR-URL: https://github.com/nodejs/node/pull/6664
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/deps/npm/node_modules/readable-stream/node_modules/inline-process-browser/node_modules/through2/node_modules/xtend/README.md b/deps/npm/node_modules/readable-stream/node_modules/inline-process-browser/node_modules/through2/node_modules/xtend/README.md
new file mode 100644
index 0000000000..093cb2978e
--- /dev/null
+++ b/deps/npm/node_modules/readable-stream/node_modules/inline-process-browser/node_modules/through2/node_modules/xtend/README.md
@@ -0,0 +1,32 @@
+# xtend
+
+[![browser support][3]][4]
+
+[![locked](http://badges.github.io/stability-badges/dist/locked.svg)](http://github.com/badges/stability-badges)
+
+Extend like a boss
+
+xtend is a basic utility library which allows you to extend an object by appending all of the properties from each object in a list. When there are identical properties, the right-most property takes precedence.
+
+## Examples
+
+```js
+var extend = require("xtend")
+
+// extend returns a new object. Does not mutate arguments
+var combination = extend({
+    a: "a",
+    b: 'c'
+}, {
+    b: "b"
+})
+// { a: "a", b: "b" }
+```
+
+## Stability status: Locked
+
+## MIT Licenced
+
+
+  [3]: http://ci.testling.com/Raynos/xtend.png
+  [4]: http://ci.testling.com/Raynos/xtend