Summary:
Pull Request resolved: https://github.com/facebook/flipper/pull/1224
Upgrade Electron-related dependencies to version 9.
Changes includes:
- force `fetch` to `no-cors` mode to get rid of CORS policy error while upgrading to version 9
- `keytar` returns promises so changes to reflect that ([reference](https://github.com/atom/node-keytar/blob/master/keytar.d.ts))
Reviewed By: passy
Differential Revision: D21862765
fbshipit-source-id: 25e236ee568934ee9c64dcc90f2fc9648c905b6a
9f931db91f
