Upgrade rkyv to 0.8 and remove bytecheck

The rkyv 0.8 version is a major update that brings many improvements and new
features. This patch adapts the API to version 0.8, removing the old API.

Additionally, the key-value type in the test cases has been changed from
HashMap to BTreeMap, as the data bytes of HashMap are no longer fixed in
version 0.8. I suspect this is due to the unordered sorting of HashMap.

After switching to BTreeMap, everything works fine.

Cargo.toml

@@ -14,9 +14,8 @@ keywords = ["memory-mapping", "synchronization", "interprocess", "wait-free", "z
 categories = ["os", "filesystem", "concurrency", "data-structures", "memory-management"]
 
 [dependencies]
-bytecheck = { version = "~0.6.8", default-features = false }
 memmap2 = "0.9.4"
-rkyv = { version = "0.7.40", features = ["validation", "strict"] }
+rkyv = "0.8.9"
 thiserror = "1.0.30"
 wyhash = "0.5.0"
 

examples/common/mod.rs

@@ -1,9 +1,8 @@
-use bytecheck::CheckBytes;
 use rkyv::{Archive, Deserialize, Serialize};
 
 /// Example data-structure shared between writer and reader(s)
 #[derive(Archive, Deserialize, Serialize, Debug, PartialEq)]
-#[archive_attr(derive(CheckBytes))]
+#[rkyv(compare(PartialEq), derive(Debug))]
 pub struct HelloWorld {
     pub version: u32,
     pub messages: Vec<String>,