v8.8.1

Contributed:

• Ensure typegen disconnects from WS endpoint (Thanks to https://github.com/rflechtner)

Changes:

• Ensure storage Option<Option<Type>> are correctly handled
• Cater for named event fields (expose on event data as available)
• Expose (partial) runtimeVersion on api.at interfaces
• Add aliases for DispatchError{U8, U8a} (default to new U8a variant)
• Align DispatchError definition with latest Substrate
• Adjust contracts RPC definitions with DispatchError return
• Ensure blockHash is passed through with era sign options
• Workaround for default calls on chains with non-standard indexes
• Optimization for value returns on merged queries
• Update derive.bagsList to detect voterList pallet
• Add Polkadot 9200/9220 & Westend 9230 upgrade blocks