Update Rust crate serde to 1.0.194

Cargo.toml

@@ -15,7 +15,7 @@ repository = "https://github.com/dkim19375/todoist-rest-api-rs"
 chrono = { version = "0.4.31", features = ["serde"] }#, optional = true }
 chrono-tz = { version = "0.8.5", features = ["serde"] }#, optional = true }
 reqwest = { version = "0.11.23", features = ["json"] }
-serde = { version = "1.0.193", features = ["derive"] }
+serde = { version = "1.0.194", features = ["derive"] }
 serde_json = "1.0.109"
 uuid = { version = "1.6.1", features = ["v4", "fast-rng", "macro-diagnostics"] }