chore: suppress arbitrary_source_item_ordering

Author: vil02

Cargo.toml

@@ -145,6 +145,7 @@ cfg_not_test = { level = "allow", priority = 1 }
 field_scoped_visibility_modifiers = { level = "allow", priority = 1 }
 unused_trait_names = { level = "allow", priority = 1 }
 used_underscore_items = { level = "allow", priority = 1 }
+arbitrary_source_item_ordering = { level = "allow", priority = 1 }
 # nursery-lints:
 branches_sharing_code = { level = "allow", priority = 1 }
 cognitive_complexity = { level = "allow", priority = 1 }