Update typed-builder requirement in /crates/mux-client (#45)

Updates the requirements on [typed-builder](https://github.com/idanarye/rust-typed-builder) to permit the latest version.
- [Changelog](https://github.com/idanarye/rust-typed-builder/blob/master/CHANGELOG.md)
- [Commits](https://github.com/idanarye/rust-typed-builder/commits)

---
updated-dependencies:
- dependency-name: typed-builder
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

crates/mux-client/Cargo.toml

@@ -18,7 +18,7 @@ cfg-if = "1.0.0"
 serde = { version = "1.0.103", features = ["derive"] }
 ssh_format = "0.14.1"
 
-typed-builder = "0.17.0"
+typed-builder = "0.18.0"
 once_cell = "1.10.0"
 
 sendfd = { version = "0.4.1", features = ["tokio"] }