Contributed:

• Add isHistoric flag to ETH RPCs (Thanks to https://github.com/stwiname)
• Align contract instantiate types with Substrate (Thanks to https://github.com/kwingram25)

Changes:

• Adjust map header output type with lookup id
• Re-enable all BitVec tests for toU8a
• Expose txIndex as event index on extrinsic results
• Allow inspection of Codec encoding (experimental)
• Allow inspection of storage key encoding (experimental)
• Update to latest Substrate, Kusama & Polkadot static metadata
• Update @polkadot/util to 8.4.1