524a743313
* Fix for Flow issues in SimpleCacheProvider **what is the change?:** - Fixed some flow errors which were somehow swallowed when CI originally - Loosen flow types to avoid issue with recursive loop in Flow; https://github.com/facebook/flow/issues/5870 **why make this change?:** To unbreak master and unblock other changes we want to make. **test plan:** Flow passes! **issue:** https://github.com/facebook/react/issues/12941 * Fix lints