Broken in leaflet 1.8.0

Hi !

The plugin does not work anymore with Leaflet 1.8.0 but ok with Lealfet 1.7.1

minmal code : https://codesandbox.io/s/frosty-tamas-yevb21?file=/src/index.js

Uncaught TypeError: Cannot read properties of undefined (reading 'indexOf') at NewClass.addTo (leaflet-src.js:4789:1)

[unzsnu]

I fixed this error setting the position

 const searchControl = new GeoSearchControl({
      position: 'topright', /* <---- add this, options: 'topleft', 'topright', 'bottomleft', 'bottomright' */
      provider: props.provider,
      style: props.controlStyle,
      ...props
    });

Position has not been set yet, so getPosition() returns undefined and then, checking the position, it breaks

[brbrbr]

Appears that the default options are not initialized correctly.

I added the lot (extending the fix from unzsnu

  var searchControl = new GeoSearch.GeoSearchControl({
          provider: provider,
          position: 'topleft',
          showMarker: true,
          marker: {
            icon: get_icon('roos'),
            cat: 'roos',
            draggable: true,
          },
          maxMarker: 1,
          autoClose: true,
          autoComplete: true,
          retainZoomLevel: true,
          maxSuggestions: 5,
          keepResult: true,
          resultFormat: function(t) {
            return "" + t.result.label;
          },
          updateMap: !0

        });