fix: Use explicitly std::mem::drop to free memory

It fix lint "non-binding `let` on a type that implements `Drop`"

Author: jhg

src/lib.rs

@@ -55,7 +55,7 @@ pub fn raw<T>(data: T) -> *mut T {
 ///
 /// Invalid pointer or call it twice could cause an undefined behavior or heap error and a crash.
 pub unsafe fn free<T>(pointer: *mut T) {
-    let _ = own_back(pointer); // Ignore the must use lint as previous behavior was ignore null pointers
+    std::mem::drop(own_back(pointer));
 }
 
 /// Opposite of [`raw<T>()`], to use Rust's ownership as usually.