v8.1.1

Contributed:

• Add Picasso genesisHash (Thanks to https://github.com/hussein-aitlahcen)

Changes:

• Allow for use of secp256k1 from @polkadot/wasm-crypto
• Adjust isBigInt to not do instanceof check
• Ensure consequtive capitals in stringCamelCase are lowercased
• Use @polkadot/x-bigint for BigInt constructor
• Split @noble/hashes fork into x-noble-hashes
• Add @noble/secp256k1 fork into x-noble-secp256k1, replaces elliptic