Use types_or instead of types which matches nothing (#9)

Author: jevinskie

.pre-commit-hooks.yaml

@@ -3,7 +3,7 @@
   description: ""
   entry: xml-fmt
   language: python
-  types: ["xsd", "xml"]
+  types_or: ["xsd", "xml"]
   args: []
   require_serial: false
   additional_dependencies: []