[malody] allow unknown keys in input

CHANGELOG.md

@@ -1,3 +1,8 @@
+# v1.2.1
+## Fixed
+- [malody] Parsing a malody file with keys that are unused for conversion
+  (like `meta.mode_ext` or `extra`) would fire errors, not anymore !
+
 # v1.2.0
 ## Added
 - [malody] 🎉 initial malody support !

jubeatools/formats/malody/schema.py

@@ -3,6 +3,7 @@ from decimal import Decimal
 from enum import Enum
 from typing import List, Optional, Tuple, Union
 
+from marshmallow import EXCLUDE
 from marshmallow.validate import Range
 from marshmallow_dataclass import NewType, class_schema
 
@@ -10,6 +11,7 @@ from marshmallow_dataclass import NewType, class_schema
 class Ordered:
     class Meta:
         ordered = True
+        unknown = EXCLUDE
 
 
 @dataclass