v4.12.1

Upgrade priority: Low. Internal adjustment only, no major external usage changes.

Changelog:

• Update FundInfo type with Polkadot (Thanks to https://github.com/arjanz)

Changes:

• Allow storage queries with default keys values
• Align identity Data to limit to 32 bytes in the Raw enum (as per Substrate)
• Align static (test & docs-only) metadata with latest Substrate master
• Added 9030 upgrade blocks for Kusama & Westend
• Cleanup of Eth pallet RPC definitions
• Cleanup README for @polkadot/rpc-core (recommended for internal-usage only)
• Cleanup internal tests (no dangling handles, cater for Jest 27)