Skip some mutants

Signed-off-by: Jacinta Ferrant <jacinta@trustmachines.co>

libsigner/src/events.rs

@@ -225,6 +225,7 @@ impl SignerStopSignaler {
 }
 
 impl EventStopSignaler for SignerStopSignaler {
+    #[cfg_attr(test, mutants::skip)]
     fn send(&mut self) {
         self.stop_signal.store(true, Ordering::SeqCst);
         // wake up the thread so the atomicbool can be checked

libsigner/src/v0/messages.rs

@@ -72,6 +72,7 @@ define_u8_enum!(SignerMessageTypePrefix {
     BlockResponse = 1
 });
 
+#[cfg_attr(test, mutants::skip)]
 impl MessageSlotID {
     /// Return the StackerDB contract corresponding to messages of this type
     pub fn stacker_db_contract(

libsigner/src/v1/messages.rs

@@ -108,6 +108,7 @@ define_u8_enum!(SignerMessageTypePrefix {
     EncryptedSignerState = 4
 });
 
+#[cfg_attr(test, mutants::skip)]
 impl MessageSlotID {
     /// Return the StackerDB contract corresponding to messages of this type
     pub fn stacker_db_contract(