Update request version to avoid npm warn (sass#1915)

* Update request version to avoid npm warn

Author: arzafran

package.json

@@ -68,7 +68,7 @@
     "nan": "^2.3.2",
     "node-gyp": "^3.3.1",
     "npmlog": "^4.0.0",
-    "request": "^2.61.0",
+    "request": "^2.79.0",
     "sass-graph": "^2.1.1",
     "stdout-stream": "^1.4.0"
   },