update Dependencies

Author: lisong

package.json

@@ -40,23 +40,23 @@
     "bluebird": "^3.4.1",
     "body-parser": "^1.15.2",
     "cookie-parser": "^1.4.3",
-    "debug": "~2.2.0",
+    "debug": "^2.3.3",
     "express": "^4.14.0",
     "formidable": "^1.0.17",
-    "fs-extra": "^0.30.0",
-    "helmet": "^2.1.0",
+    "fs-extra": "^1.0.0",
+    "helmet": "^3.1.0",
     "jsonwebtoken": "^7.1.7",
     "lodash": "^4.5.1",
     "markdown-it": "^8.0.1",
     "moment": "^2.14.1",
-    "morgan": "~1.6.1",
+    "morgan": "^1.7.0",
     "mysql": "^2.10.2",
     "node-unzip-2": "^0.2.1",
     "nodemailer": "^2.5.0",
     "pug": "^2.0.0-beta6",
     "qiniu": "^6.1.10",
     "rand-token": "^0.2.1",
-    "recursive-fs": "^0.1.4",
+    "recursive-fs": "^1.0.0",
     "redis": "^2.6.2",
     "request": "^2.72.0",
     "sequelize": "^3.24.5",