Fix deprecated stage names

This was fixed mechanically using the following command:

```
pre-commit migrate-config
```

Author: kurtmckee

.pre-commit-config.yaml

@@ -1,5 +1,5 @@
 ---
-default_stages: [commit, push]
+default_stages: [pre-commit, pre-push]
 default_language_version:
   # force all unspecified python hooks to run python3
   python: python3