feat: change piece number to uint32 (#221)

Signed-off-by: Gaius <gaius.qi@gmail.com>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dragonfly-api"
-version = "2.0.55"
+version = "2.0.56"
 authors = ["Gaius <gaius.qi@gmail.com>"]
 edition = "2021"
 license = "Apache-2.0"

proto/common.proto

@@ -350,7 +350,7 @@ message Range {
 // Piece represents information of piece.
 message Piece {
   // Piece number.
-  int32 number = 1;
+  uint32 number = 1;
   // Parent peer id.
   optional string parent_id = 2;
   // Piece offset.

src/common.v2.rs

@@ -380,8 +380,8 @@ pub struct Range {
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct Piece {
     /// Piece number.
-    #[prost(int32, tag = "1")]
-    pub number: i32,
+    #[prost(uint32, tag = "1")]
+    pub number: u32,
     /// Parent peer id.
     #[prost(string, optional, tag = "2")]
     pub parent_id: ::core::option::Option<::prost::alloc::string::String>,