refmt fixer for ReasonML

autoload/ale/fix/registry.vim

@@ -127,6 +127,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['haskell'],
 \       'description': 'Fix Haskell files with hfmt.',
 \   },
+\   'refmt': {
+\       'function': 'ale#fixers#refmt#Fix',
+\       'suggested_filetypes': ['reason'],
+\       'description': 'Fix ReasonML files with refmt.',
+\   },
 \}
 
 " Reset the function registry to the default entries.