fix: remove std requirement for signing, fmt

Author: pv42

mavlink-core/Cargo.toml

@@ -41,5 +41,5 @@ sha2 = { version = "0.10", optional = true }
 "embedded-hal-02" = ["dep:nb", "dep:embedded-hal-02"]
 "serde" = ["dep:serde", "dep:serde_arrays"]
 "tokio-1" = ["dep:tokio"]
-"signing" = ["dep:sha2", "std"]
+"signing" = ["dep:sha2"]
 default = ["std", "tcp", "udp", "direct-serial", "serde"]

mavlink/tests/tcp_loopback_tests.rs

@@ -9,7 +9,7 @@ mod test_tcp_connections {
 
     use crate::test_shared;
 
-    /// Test whether we can send a message via TCP and receive it OK. This also test signing as a property of a MavConnection if the signing feature is enabled. 
+    /// Test whether we can send a message via TCP and receive it OK. This also test signing as a property of a MavConnection if the signing feature is enabled.
     #[test]
     pub fn test_tcp_loopback() {
         const RECEIVE_CHECK_COUNT: i32 = 5;
@@ -21,7 +21,8 @@ mod test_tcp_connections {
 
         let server_thread = thread::spawn(move || {
             //TODO consider using get_available_port to use a random port
-            let mut server = mavlink::connect("tcpin:0.0.0.0:14550").expect("Couldn't create server");
+            let mut server =
+                mavlink::connect("tcpin:0.0.0.0:14550").expect("Couldn't create server");
 
             #[cfg(feature = "signing")]
             server.setup_signing(Some(singing_cfg_server));

mavlink/tests/test_shared/mod.rs

@@ -8,9 +8,8 @@ pub const COMMON_MSG_HEADER: mavlink::MavHeader = mavlink::MavHeader {
 
 #[cfg(feature = "signing")]
 pub const SECRET_KEY: [u8; 32] = [
-    0x00, 0x01, 0xf2, 0xe3, 0xd4, 0xc5, 0xb6, 0xa7, 0x98, 0x00, 0x70, 0x76, 0x34, 0x32, 0x00,
-    0x16, 0x22, 0x42, 0x00, 0xcc, 0xff, 0x7a, 0x00, 0x52, 0x75, 0x73, 0x74, 0x00, 0x4d, 0x41,
-    0x56, 0xb3,
+    0x00, 0x01, 0xf2, 0xe3, 0xd4, 0xc5, 0xb6, 0xa7, 0x98, 0x00, 0x70, 0x76, 0x34, 0x32, 0x00, 0x16,
+    0x22, 0x42, 0x00, 0xcc, 0xff, 0x7a, 0x00, 0x52, 0x75, 0x73, 0x74, 0x00, 0x4d, 0x41, 0x56, 0xb3,
 ];
 
 #[cfg(feature = "common")]