v2.2.1

Upgrade priority: Low.

• Breaking change @polkadot/api-contract now only supports ink! 3.0-rc1 and later formats. Users of ink! 2.1 are recommended to stay on an older version until upgraded.

Contributed:

• Add latest Ink! types (Thanks to https://github.com/ascjones & https://github.com/kwingram25)
• Add base for new contract metadata parsing (Thanks to https://github.com/ascjones & https://github.com/kwingram25)

Changes:

• Introduce OriginCaller type (& apply to scheduler types)
• Adjust ContractInfo struct to cater for latest Substrate
• Allow snake_case to be handled transparently in structs
• Full new api-contract developer interfaces (Code, Blueprint, Contract)
• Rework Abi & Abi Registry use & parse (on-top-of-contributed) for efficiency & non-global clobber
• Allow null input on Text values in addition to existing undefined
• Remove all documentation after move to https://github.com/polkadot-js/docs repo
• Adjust type encoding from TypeDef, s/encodeType/encodeTypeDef/