1.0.0

pre-commit will now be following [semver](http://semver.org/). Thanks to all

of the [contributors](https://github.com/pre-commit/pre-commit/graphs/contributors)

that have helped us get this far!

- pre-commit's cache directory has moved from `~/.pre-commit` to

`$XDG_CACHE_HOME/pre-commit` (usually `~/.cache/pre-commit`).

- `pre-commit clean` now cleans up both the old and new directory.

- If you were caching this directory in CI, you'll want to adjust the

location.

- #562 issue by @nagromc.

- #602 PR by @asottile.

- A new configuration format for `.pre-commit-config.yaml` is introduced which

will enable future development.

- The new format has a top-level map instead of a top-level list. The

new format puts the hook repositories in a `hooks` key.

- Old list-based configurations will continue to be supported.

- A command `pre-commit migrate-config` has been introduced to "upgrade"

the configuration format to the new map-based configuration.

- `pre-commit autoupdate` now automatically calls `migrate-config`.

- In a later release, list-based configurations will issue a deprecation

warning.

- An example diff for upgrading a configuration:

```diff

+repos:

- repo: https://github.com/pre-commit/pre-commit-hooks

sha: v0.9.2

hooks:

```

- #414 issue by @asottile.

- #610 PR by @asottile.

new map format.