chore(package): update ftp-srv to version 3.0.2

Closes #209

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
     "claudia": "^5.1.1",
     "eslint": "^5.0.0",
     "express-list-endpoints": "^3.0.1",
-    "ftp-srv": "^2.15.0",
+    "ftp-srv": "^3.0.2",
     "get-port": "^4.0.0",
     "husky": "^0.14.3",
     "proxyquire": "^2.0.0",