Moved to ejs now helpers aren’t loading

Any idea how the helpers are being loaded?

I defined them in `.hygen.js`:

```js
export default {
	helpers: {
		getFilename: (locals, include_date) => {
			// …
		}
	}
}
```

But then when I use them in the template, they are undefined:

```sh
Loaded templates: _templates
TypeError: ejs:1
 >> 1| src/posts/<%= h.getFilename(locals) %>.md

h.getFilename is not a function
```