Summary:
### iOSSample:
Fix iOS Sample App crash: UI need to be updated on Main Thread
### SampleSwift:
* Upgrade swift version
* Fix force unwrapping
* UI need to be updated on Main Thread
## Changelog
Pull Request resolved: https://github.com/facebook/flipper/pull/740
Differential Revision: D19397414
Pulled By: passy
fbshipit-source-id: 7af84c0fe43861aff6a18c36bf81a940baec5147
Summary: Add the affiliates bit that the linter is checking for.
Reviewed By: jknoxville
Differential Revision: D15164826
fbshipit-source-id: 500ffe89ec0c2fd3acfbc374408d16a337cecfa4