package: update "extend" to v3

TooTallNate · TooTallNate · commit f92c1d0da713 · 2015-07-06T15:50:03.000-07:00
diff --git a/package.json b/package.json
@@ -24,7 +24,7 @@
   "dependencies": {
     "agent-base": "~1.0.1",
     "debug": "2",
-    "extend": "~1.2.1"
+    "extend": "3"
   },
   "devDependencies": {
     "mocha": "2",
