update clippy for 1.78

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 
 members = ["amqprs", "amqp_serde", "examples", "benchmarks"]
-
+rust-version = "1.56"
 resolver = "2"
 
 # [profile.bench]

amqp_serde/src/ser.rs

@@ -135,9 +135,9 @@ where
         self.serialize_unit()
     }
 
-    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok>
+    fn serialize_some<T>(self, value: &T) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         value.serialize(self)
     }
@@ -161,23 +161,23 @@ where
     }
 
     // serialize only contained value
-    fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
+    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         value.serialize(self)
     }
 
     // serialize variant name and contained value
-    fn serialize_newtype_variant<T: ?Sized>(
+    fn serialize_newtype_variant<T>(
         self,
         _name: &'static str,
         _variant_index: u32,
         variant: &'static str,
         value: &T,
     ) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         variant.serialize(&mut *self)?;
         value.serialize(&mut *self)
@@ -252,9 +252,9 @@ where
 
     type Error = Error;
 
-    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         value.serialize(&mut **self)
     }

amqprs/src/api/connection.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::assigning_clones)] // Need to support `1.56.0` but `clone_into` is stable since `1.63.0`
 //! Implementation of AMQP_0-9-1's Connection class compatible with RabbitMQ.
 //!
 //! It provides [APIs][`Connection`] to manage an AMQP `Connection`.