add clone derive for TypeMap and Faststr Map

src/faststr_map.rs

@@ -6,7 +6,7 @@ use fxhash::FxHashMap;
 /// This is an optimized version of TypeMap to FastStr that eliminates the need to Box the values.
 ///
 /// This map is suitable for T that impls both From<FastStr> and Into<FastStr>.
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Clone)]
 pub struct FastStrMap {
     inner: FxHashMap<TypeId, FastStr>,
 }

src/type_map.rs

@@ -63,7 +63,7 @@ impl<'a, K, V> Entry<'a, K, V> {
     }
 }
 
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Clone)]
 pub struct TypeMap {
     inner: FxHashMap<TypeId, AnyObject>,
 }