fix: Parse away any additional serde tokens that we do not care about

lua_typed_macro/src/lib.rs

@@ -313,6 +313,12 @@ fn parse_fields(
                         }
                     } else if meta.path.is_ident("flatten") {
                         flatten = true;
+                    } else {
+                        // Parse away any additional token that we don't care about
+                        if meta.input.peek(Token![=]) {
+                            meta.input.parse::<Token![=]>()?;
+                            meta.input.parse::<LitStr>()?;
+                        }
                     }
 
                     Ok(())