* feat: new JSONSchema, and shortcuts and auto-inference for basic types
* feat: disallow null or undefined in setItem
* feat: allow custom indexeddb database and store names (#78)
* feat: better error management and move idb fallback to main service
* internal: reduce surface api
* fix: stringify all keys for interoperability
* fix: better error management
* feat: new getItem() signature (#79)
* fix: catch stringify error
* fix: catch quota error on localStorage setItem
* fix: catch missing store error
* fix: remove getUnsafeItem()
* feat: new IDB storing behavior with no wrapping (#82)
* feat: new prefix token for interop
* feat: removeItem when storing null or undefined (#93)
* feat: remove xSubscribe() methods (#96)
* feat: separate localStorage and Map APIs (#100)
* feat: iterating keys()
* fix: deprecate xSubscribe
* feat: rxjs 6.4 as minimum
* fix: use openKeyCursor() when possible for perf
* feat: schema option in set()
* fix: throw when storing data that can't be serialized in localStorage (#104)
* feat: engine and database info + opt-in for unwraped values in idb + new options system (#107)
* fix: new interface for new options system
* fix: test and doc about blob refused in idb in safari private