* Initial setup for graphcache-rn-async-storage

* Add readme docs for @urql/graphcache-rn-async-storage

* Add a note on @urql/exchange-graphcache/default-storage to the docs site

* Add a changelog and initial release

* Make default keys less shouty

* Export storage options type

* Remove optional chaining

* Add arg to catch block (else build fails with TypeError: Cannot read property 'type' of null)

* Clean up NetInfo if the exchange is reinitialised

* Rename package to @urql/storage-rn

* Add tests for read and write metadata

* Add tests for write data

* Add tests for onOnline

* Save data under a single key

* Simplify and add tests for readData

* Add a clear method to rn storage

* Merge data from all days

* Move async storage calls inline

* Ensure deleted keys are also removed from old cache

* Use forEach instead of spread

* Simplify assignment logic
Co-authored-by: Grant Sander <gksander93@gmail.com>