update package.json - npm audit fix

Author: scarlet9

package.json

@@ -13,8 +13,8 @@
     "async": "^1.5.0",
     "formidable": "^1.0.11",
     "imagemagick": "^0.1.2",
-    "lodash": "^0.9.2",
-    "mkdirp": "^0.3.4"
+    "lodash": "^4.17.11",
+    "mkdirp": "^0.5.1"
   },
   "engines": {
     "node": ">= 0.8.8"