Fix clippy warnings

Author: regexident

macros/src/config/for_variant/discriminant.rs

@@ -5,7 +5,7 @@ use crate::attr::{NAME, NESTED, VALUE};
 #[derive(Clone)]
 pub enum NestedDiscriminantType {
     Default,
-    Custom(syn::Type),
+    Custom(Box<syn::Type>),
 }
 
 #[derive(Clone, Default)]

macros/src/enum_deriver.rs

@@ -600,7 +600,7 @@ impl EnumDeriver {
                             discriminant_variant_nested = Some(nested_type);
                         }
                         NestedDiscriminantType::Custom(custom_type) => {
-                            discriminant_variant_nested = Some(custom_type.clone());
+                            discriminant_variant_nested = Some((**custom_type).clone());
                         }
                     }
                 }