fix: remove Eq/PartialEq and clone hasher to resolve trait and move errors

src/digest_engine/sha2_digest.rs

@@ -1,7 +1,7 @@
 use std::io;
 use sha2::{Digest, Sha256};
 
-#[derive(Debug, Eq, PartialEq, Clone, Default)]
+#[derive(Debug, Clone, Default)]
 pub struct DigestEngineSha256 {
     hasher: Sha256,
 }
@@ -25,7 +25,7 @@ impl DigestEngine for DigestEngineSha256 {
     }
 
     fn finalize(&mut self) -> io::Result<String> {
-        let result = self.hasher.finalize();
+        let result = self.hasher.clone().finalize();
         Ok(format!("{:x}", result))
     }
 }