message: upgrade ffi to use new version
diff: "electron-dl": "1.12.0",
  "electron-log": "2.2.17",
  "electron-spellchecker": "git+https://github.com/symphonyoss/electron-spellchecker.git#v1.1.4",
  - "ffi": "git+https://github.com/symphonyoss/node-ffi.git#v1.2.8",
  + "ffi": "git+https://github.com/symphonyoss/node-ffi.git#v1.2.9",
  "filesize": "3.6.1",
  "keymirror": "0.1.1",
  "lodash.difference": "4.5.0",
  