custom rendered that renders html content

Hi,
I want to know why there is no possibility to define a type:'html' on a column with a customRenderer.
In fact I made a quite simple renderer :
```

import { Component, Input, OnInit } from '@angular/core';

@Component({
template: `
{{renderValue}}
`,
})
export class booleanRendererComponent implements OnInit {

renderValue: string;

@Input() value: boolean;
@Input() rowData: any;

ngOnInit() {
this.renderValue = '

';
if (this.value == false){
this.renderValue = '';
}
}

}
```

which I would like to call like this ( the commented line :

```
my_boolean: {
title: 'My Boolean',
type: 'html',
//renderComponent: booleanRendererComponent
valuePrepareFunction: (value) => { return value == true ? '

' : '' }
```
I am not blocked as I used valuePrepareFunction which does the job, but I think it will be clearer if we do it directly in my renderer.

Thanks