Add sort-simple-yaml hook (originally private hook from yelp_pre_commit_hooks)
diff --git a/README.md b/README.md
index 3b62234..8db7eef 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,7 @@
- `--no-sort-keys` - when autofixing, retain the original key ordering (instead of sorting the keys)
- `--top-keys comma,separated,keys` - Keys to keep at the top of mappings.
- `requirements-txt-fixer` - Sorts entries in requirements.txt
+- `sort-simple-yaml` - Sorts simple YAML files which consist only of top-level keys, preserving comments and blocks.
- `trailing-whitespace` - Trims trailing whitespace.
- Markdown linebreak trailing spaces preserved for `.md` and`.markdown`;
use `args: ['--markdown-linebreak-ext=txt,text']` to add other extensions,
