Replace deprecated React lifecycle methods

[chinesedfan]

As suggested in https://github.com/gitpoint/git-point/pull/862#issuecomment-524167180, and more potential problems can be discovered by StrictMode.

• 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