chore: add unsafe blocks required in Rust 2024.

In Rust 2024 marking a function as `unsafe` only indicates that this function must be used within an unsafe block, but doesn't allow the function itself to call unsafe function without explicitly using an unsafe block.

Author: plusvic

lib/src/lib.rs

@@ -173,5 +173,7 @@ mod utils {
 ///
 /// [wasmtime]: https://wasmtime.dev/
 pub unsafe fn finalize() {
-    wasm::free_engine();
+    unsafe {
+        wasm::free_engine();
+    }
 }

lib/src/wasm/mod.rs

@@ -830,7 +830,9 @@ pub(crate) unsafe fn free_engine() {
     ))]
     {
         #[allow(static_mut_refs)]
-        ENGINE.take().unwrap().unload_process_handlers()
+        unsafe {
+            ENGINE.take().unwrap().unload_process_handlers()
+        }
     }
 }