• Important Contract RPC result updated on Substrate, on older chains supply ContractExecResult: 'ContractExecResultTo255'
• Support for custom HTTP headers in providers (Thanks to https://github.com/brad-larson)
• Update known types for Centrifuge (Thanks to https://github.com/philipstanislaus)
• Update API users with Registrar #1 (Thanks to https://github.com/chevdor)
• Raw/Bytes toHuman() displays utf-8 as available
• Add fallback for setImmediate when not polyfilled
• Update NetworkState reputation type for system_networkState RPC
• Update session progress calcs for Aura (cater for negative)
• Fix class prototype for (basically-deprecated) Linkage type
• Add Polkadot types for purchase pallet