template file from option doesn't work ejs

```
---
to: appinfo.json
from: template/appinfo.json
force: true
---
```

// template/appinfo.json
```
{
  "id": "com.test.app<%= env === 'dev' ? '-dev' : env === 'stage' ? '-stage' : '' %>"
}
```

// output: appinfo.json
```
{
  "id": "com.test.app<%= env === 'dev' ? '-dev' : env === 'stage' ? '-stage' : '' %>"
}
```

output file doesn't work ejs function. 