fix(package): move the v8-profiler to optional dependency

Author: gergelyke

package.json

@@ -52,13 +52,13 @@
     "node-uuid": "1.4.7",
     "qs": "6.2.0",
     "semver": "5.1.0",
-    "sync-request": "3.0.1",
-    "v8-profiler": "5.6.5"
+    "sync-request": "3.0.1"
   },
   "optionalDependencies": {
     "microtime": "2.1.1",
     "event-loop-stats": "1.0.0",
-    "gc-stats": "1.0.0"
+    "gc-stats": "1.0.0",
+    "v8-profiler": "5.6.5"
   },
   "devDependencies": {
     "amqplib": "0.4.1",