deps: upgrade npm to 3.9.3

Contains the following npm releases:
- v3.9.0: https://github.com/npm/npm/releases/tag/v3.9.0
- v3.9.1: https://github.com/npm/npm/releases/tag/v3.9.1
- v3.9.2: https://github.com/npm/npm/releases/tag/v3.9.2
- v3.9.3: https://github.com/npm/npm/releases/tag/v3.9.3

PR-URL: https://github.com/nodejs/node/pull/7030
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/deps/npm/node_modules/readable-stream/node_modules/buffer-shims/readme.md b/deps/npm/node_modules/readable-stream/node_modules/buffer-shims/readme.md
new file mode 100644
index 0000000000..7ea6475e28
--- /dev/null
+++ b/deps/npm/node_modules/readable-stream/node_modules/buffer-shims/readme.md
@@ -0,0 +1,21 @@
+buffer-shims
+===
+
+functions to make sure the new buffer methods work in older browsers.
+
+```js
+var bufferShim = require('buffer-shims');
+bufferShim.from('foo');
+bufferShim.alloc(9, 'cafeface', 'hex');
+bufferShim.allocUnsafe(15);
+bufferShim.allocUnsafeSlow(21);
+```
+
+should just use the original  in newer nodes and on older nodes uses fallbacks.
+
+Known Issues
+===
+- this does not patch the buffer object, only the constructor stuff
+- it's actually a polyfill
+
+![](https://i.imgur.com/zxII3jJ.gif)