* Add item decryption to encryptService
* Create multithreadEncryptService subclass to handle web workers
* Create encryption web worker
* Refactor cipherService to use new interface
* Update dependencies
* Move resolveLegacyKey to encryptService for utf8 decryption
* Deprecate account.keys.legacyEtmKey
Includes migration to tidy up leftover data
* Use new IEncrypted interface