Bump rayon from 1.1.0 to 1.2.0 (#5758)

Bumps [rayon](https://github.com/rayon-rs/rayon) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/rayon-rs/rayon/releases)
- [Changelog](https://github.com/rayon-rs/rayon/blob/master/RELEASES.md)
- [Commits](https://github.com/rayon-rs/rayon/compare/rayon-core-v1.1.0...v1.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

client/Cargo.toml

@@ -14,7 +14,7 @@ bs58 = "0.2.5"
 jsonrpc-core = "13.1.0"
 log = "0.4.8"
 rand = "0.6.5"
-rayon = "1.1.0"
+rayon = "1.2.0"
 reqwest = "0.9.20"
 serde = "1.0.99"
 serde_derive = "1.0.99"