build(deps): update concurrently (angular#379)

This fixes processes being left alive in gitbash.

/cc @Foxandxss

Author: filipesilva

package.json

@@ -40,7 +40,7 @@
     "zone.js": "^0.7.4"
   },
   "devDependencies": {
-    "concurrently": "^3.1.0",
+    "concurrently": "^3.2.0",
     "lite-server": "^2.2.2",
     "typescript": "~2.0.10",