What's Changed
- [FFI]: Don't panic if file was already deleted by @gupnik in #4292
- Split Polymesh chain from Polkadot impl. by @Neopallium in #4229
- Adds support for complex custom types in Rust <> CPP FFI Generator by @gupnik in #4294
- Allows extension to import a wallet with private key by @gupnik in #4297
Full Changelog: 4.2.12...4.2.13