`Key` is now also Clone

src/lib.rs

@@ -69,11 +69,13 @@ pub enum KeyType {
 ///
 /// Also implements `serde::{Serialize, Deserialize}` via a custom
 /// serialiser which allows easy encryption of the key itself.
+#[derive(Clone)]
 pub struct Key {
     tt: KeyType,
     key: KeyBuf,
 }
 
+#[derive(Clone, Copy)]
 union KeyBuf {
     _32: [u8; 32],
     _64: [u8; 64],