Set an upper bound limit on Maison

Limits Maison version to 2.0.0 to avoid import issues

pyproject.toml

@@ -28,7 +28,7 @@ requires-python = ">=3.8"
 dependencies = [
     "click>=8.1.3",
     "ruyaml>=0.91.0",
-    "maison>=1.4.0",
+    "maison>=1.4.0,<2.0.0",
 ]
 name = "yamlfix"
 description = "A simple opionated yaml formatter that keeps your comments!"