Merge pull request #106 from ghallak/cargo-warn

Use default-features to fix cargo warning

Author: yogh333

Cargo.toml

@@ -7,8 +7,8 @@ edition = "2021"
 [dependencies]
 ledger_device_sdk = "1.20.2"
 include_gif = "1.2.0"
-serde = {version="1.0.192", default_features = false, features = ["derive"]}
-serde-json-core = { git = "https://github.com/rust-embedded-community/serde-json-core"}
+serde = { version="1.0.192", default-features = false, features = ["derive"] }
+serde-json-core = { git = "https://github.com/rust-embedded-community/serde-json-core" }
 hex = { version = "0.4.3", default-features = false, features = ["serde", "alloc"] }
 numtoa = "0.2.4"