Replace deprecated React lifecycle methods

As suggested in https://github.com/gitpoint/git-point/pull/862#issuecomment-524167180, and more potential problems can be discovered by [StrictMode](https://reactjs.org/docs/strict-mode.html).

- componentWillMount
- [ ] user/screens/starred-repository-list.screen.js
- componentWillReceiveProps
- [ ] auth/screens/events.screen.js
- [ ] auth/screens/language-setting.screen.js
- [ ] auth/screens/user-options.screen.js
- [ ] notifications/screens/notifications.screen.js
- [ ] organization/screens/organization-profile.screen.js
- componentWillUpdate
- None