chore(cargo): bump futures from 0.3.29 to 0.3.30

Bumps [futures](https://github.com/rust-lang/futures-rs) from 0.3.29 to 0.3.30.
- [Release notes](https://github.com/rust-lang/futures-rs/releases)
- [Changelog](https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/futures-rs/compare/0.3.29...0.3.30)

---
updated-dependencies:
- dependency-name: futures
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

deltachat-jsonrpc/Cargo.toml

@@ -20,7 +20,7 @@ serde = { version = "1.0", features = ["derive"] }
 tempfile = "3.9.0"
 log = "0.4"
 async-channel = { version = "2.0.0" }
-futures = { version = "0.3.28" }
+futures = { version = "0.3.30" }
 serde_json = "1.0.105"
 yerpc = { version = "0.5.2", features = ["anyhow_expose", "openrpc"] }
 typescript-type-def = { version = "0.5.8", features = ["json_value"] }