Incorrect data type for account in DataTokens create

[mihaisc]

Account is actually account id and it should be string not Account in https://github.com/oceanprotocol/ocean-lib-js/blob/aaf3f1f62e356171cbe54096f10b51650d8d4c9a/src/datatokens/Datatokens.ts#L41
Tested locally and works ok with account id

UPDATE: After further testing, this should be checked for all functions in Datatokens.ts. I think that whenever account is used like { from: account } it should be string.

[0x3bfc]

noted!