Function select

select(
    domQueryOrEl: string | HTMLSelectElement,
    onChanged?: (currentValue: string) => void,
    options?: SelectOpts,
): SelectHandler
SELECT element.

Handle changes in value:
```
const mySelect = select(`#mySelect`, (newValue) => {
 console.log(`Value is now ${newValue}`);
});
```
Enable/disable:
```
mySelect.disabled = true / false;
```
Get currently selected index or value:
```
mySelect.value / mySelect.index
```
Is the currently selected value a placeholder?
```
mySelect.isSelectedPlaceholder
```
Set list of options
```
// Adds options, preselecting `opt2`.
mySelect.setOpts([`opt1`, `opt2 ...], `opt2`);
```
Select an element
```
mySelect.select(1); // Select second item
mySelect.select(1, true); // If true is added, change handler fires as well
```
Parameters
- domQueryOrEl: string | HTMLSelectElement
  Query (eg #id) or element
- OptionalonChanged: (currentValue: string) => void
  Callback when a selection is made
- options: SelectOpts = {}
  Options
Returns SelectHandler