v7.6.1

Upgdare priority: Low. Recommended for users with long-running scripts and those chains based around the latest Substrate master versions.

Contributed:

• Fix memory leak on .raw RPC calls (Thanks to https://github.com/r0t0r-r0t0r)

Changes:

• Adjust extraction of Call & Event types for metadata v14
• Adjust historic WinningData and SlotRange types (36-entry variant)
• Emit decorated event on API on metadata decoration
• Dedupe and extend WrapperKeepOpaque/WrapperOpaque
• Align Range/RangeInclusive usage with similar types
• Adjust bounty derive, return empty on no {treasury, bounties}.bounties
• Ensure handling of all TypeDefInfo keys in extraction
• Add support for rpc.contracts.uploadCode
• Workaround for generators where #private = { this... } yields undefined
• Update to latest Substrate, Kusama & Polkadot static metadata