v0.2.0

Change default `option.format` to `false`. The assets file will rename to `filename.{hash}.ext`

The issue is when assets have `min` in their filename, for example `main.min.css`, `version` task with `format = true` will generated `main.min.{hash}.css`.

With the option `minify` (default: true) and `minifyname` (default: min), file generated should look like this:
`assets.{hash}.min.{css,js}` instead of `assets.min.{hash}.{css,js}`