v1.2.1

• Important Update RPC status codes (latest Substrate 2), with the isInBlock (isFinalized now indicates finality)
• Storage .entries(arg?: any) now has the correct argument type for DoubleMap (Thanks to https://github.com/monitz87)
• Swap Kusama and Polkadot aliasses for Address to AccountId (future update)
• Add LookupSource and LookupTarget types instead of mapping these directly for aliassing
• Add BitVec type primitive
• Add support for system.account for balance & nonce queries in derives as well as Submittables (Substrate composites)
• Add rpc.author.hasKey and rpc.author.hasSessinKeys RPCs
• Add derives for the parachains interfaces
• Applied the latest types for Polkadot parachains
• registry.findMetaError now can take in a DispatchErrorModule object for error lookups (from asModule in DispatchError)
• Metadata now correctly serializes to the original input data via toHex() & toU8a()
• Metadata documentation generation rework, including the output of errors from metadata
• Update all examples and comments to use latest system.account queries (instead of system.accountNonce and balances.freeBalance/balances.reservedBalance)
• Cleanup codec/Date tests to make it run properly on all timezones
• Add explicit dependencies to all packages and move TypeScript @types/* to dev deps