HTML: Lacks go action support

Go actions in the form {{ range . }} and others, are stripped by the minifier.

Input
```html
<label></label>
<select name="" id="">
  {{range .}}
    <option value="{{.}}">{{.}}</option>
  {{else}}
    <option disabled>No options available</option>
  {{end}}
</select>
```

Results in
```html
<label></label><select><option value={{.}}>{{.}}<option disabled>No options available</select>
```